Finding the best smart smoke and carbon monoxide detector in 2026 means balancing reliable safety features with seamless connectivity and ease of use. The Kidde Smart CO Detector + Indoor Air Quality stands out as the overall top choice for its combination of air quality monitoring and smart alerts. For those prioritizing affordability, the First Alert SC5 offers solid performance at a lower price point. Meanwhile, the X-Sense Wireless Combination Detector appeals to users who want interconnected units for broader coverage. The main tradeoffs involve balancing smart features against installation complexity and price. Keep reading to see a detailed breakdown of each option and find the best fit for your needs.
Key Takeaways
- Top performers combine reliable smoke detection with integrated CO monitoring for comprehensive safety.
- Interconnectivity across multiple units remains a key feature for larger homes, but often adds to cost and setup complexity.
- Smart features like app alerts and voice notifications vary widely; some are more user-friendly than others.
- Battery-powered models offer flexibility but may require more frequent maintenance, whereas hardwired units tend to be more seamless.
- Price often correlates with additional features—investing in a premium model can deliver better long-term value for tech-savvy homeowners.
| Kidde Smart CO Detector + Indoor Air Quality, Plug-in & AA Battery |  | Best Overall Smart CO Detector with Advanced Monitoring | Detection Technology: Low-level CO sensing | Connectivity: Wi-Fi 2.4 GHz | Alarm Sound: 85 dB | VIEW LATEST PRICE | See Our Full Breakdown |
| X-Sense Smoke and Carbon Monoxide Detector (SC07) |  | Best Long-Lasting Sealed Battery Model | Model Number: SC07 | Battery Life: 10 years | Sensor Type: Photoelectric Smoke Sensor, Electrochemical CO Sensor | VIEW LATEST PRICE | See Our Full Breakdown |
| First Alert SC5 Battery Smart Smoke & Carbon Monoxide Alarm |  | Best for Smart Alert Integration with Google | Compatibility: Google’s Nest Protect | Features: Smart alerts, interconnectivity, voice alerts, low battery notification | VIEW LATEST PRICE | See Our Full Breakdown | |
| X-Sense Wireless Combination Smoke and CO Detector, XP0H-WN, 3-Pack |  | Best Multi-Unit Pack with LCD Display | Model Number: XP0H-WN | Unit Count: 3 | Battery Life: 10 years | VIEW LATEST PRICE | See Our Full Breakdown |
| X-Sense 3-Pack Interconnected Smoke and CO Detector, SC06-W |  | Best Interconnected Wireless System for Small Homes | Battery Life: 10 years | Interconnection: Wireless, up to 18 devices | Alarm Type: 2-in-1 smoke & CO | VIEW LATEST PRICE | See Our Full Breakdown |
| Kidde Smart Smoke & CO Detector with Ring |  | Best Overall for Whole-Home Smart Connectivity | Detection: Smoke and CO | Battery: 2 AA alkaline batteries (included) | Connectivity: Whole home smart connectivity, Ring app, Alexa | VIEW LATEST PRICE | See Our Full Breakdown |
| Kidde Hardwired App Enabled Smart Smoke and Carbon Monoxide Detector |  | Best for Hardwired Smart Home Integration | Power Source: 120V AC with two AA backup batteries | Connectivity: Wi-Fi (2.4 GHz) | Detection Technology: Enhanced sensing for smoke and CO | VIEW LATEST PRICE | See Our Full Breakdown |
| X-Sense Interconnected Smoke and CO Detector, SC07-W (3-Pack) |  | Best for Long-Term, Whole-Home Wireless Coverage | Battery Life: 10 years | Interconnection: Wireless up to 820 ft | Sensors: Photoelectric smoke, electrochemical CO | VIEW LATEST PRICE | See Our Full Breakdown |
| Kidde Smoke & Carbon Monoxide Detector, AA Battery-Powered, 30CUDR-VRF |  | Best Battery-Powered for Simplicity and Reliability | Detection Type: 2-in-1 smoke and CO | Power Source: 2 AA batteries (included) | Alarm Decibel: 85 dB | VIEW LATEST PRICE | See Our Full Breakdown |
| X-Sense Interconnected Smoke and CO Detector Combo, SC01-W, 6-Pack |  | Best for Affordable Whole-Home Coverage with Long Battery Life | Battery Life: 10 years | Interconnection: Wireless | Protection: Smoke and CO | VIEW LATEST PRICE | See Our Full Breakdown |
| smart smoke and co detector | Battery Life |
|---|---|
| Kidde Smart CO Detector + Indo | — |
| X-Sense Smoke and Carbon Monox | 10 years |
| First Alert SC5 Battery Smart | — |
| X-Sense Wireless Combination S | 10 years |
| X-Sense 3-Pack Interconnected | 10 years |
| Kidde Smart Smoke & CO Detecto | — |
| Kidde Hardwired App Enabled Sm | — |
| X-Sense Interconnected Smoke a | 10 years |
| Kidde Smoke & Carbon Monoxide | — |
| X-Sense Interconnected Smoke a | 10 years |
More Details on Our Top Picks
Kidde Smart CO Detector + Indoor Air Quality, Plug-in & AA Battery
This Kidde model stands out for its comprehensive air quality monitoring, combining low-level CO detection with real-time smartphone notifications, making it ideal for tech-savvy homeowners who want detailed insights. Unlike the simpler X-Sense SC07, which offers long-term reliability but no smart features, Kidde’s model provides more proactive safety management through app alerts and smart home compatibility. However, it relies on Wi-Fi for notifications and involves a subscription for deeper air quality data, adding complexity and cost. The backup batteries ensure continuous protection during outages, a key advantage over basic standalone units. This pick is best for those seeking a connected, multi-function detector that integrates with their smart home ecosystem while being willing to manage additional costs.
Pros:- Real-time notifications via smartphone app without subscription
- Advanced low-level CO detection for early warning
- Smart home compatibility with Alexa and Google Home
- Backup batteries ensure continuous operation during power outages
Cons:- Requires Wi-Fi connection for app notifications
- Subscription fee for additional air quality insights
- Higher cost compared to basic CO detectors
Best for: Homeowners who want detailed air quality insights and smart home integration with continuous monitoring.
Not ideal for: Renters or those on a tight budget who prefer simple, no-frills CO detectors without smart features.
- Detection Technology:Low-level CO sensing
- Connectivity:Wi-Fi 2.4 GHz
- Alarm Sound:85 dB
- Power Source:Plug-in with AA backup batteries
- Compatibility:Alexa, Google Home
- Subscription Service:Advanced Home Health ($1.99/month)
- Standards:UL 2034, ETL Listed
- Warranty:10 years
Our verdict“This detector suits tech-inclined homeowners seeking a multi-functional, connected safety device with detailed air quality data.”
X-Sense Smoke and Carbon Monoxide Detector (SC07)
This X-Sense SC07 is designed for simplicity and longevity, offering a sealed 10-year battery that eliminates the need for replacements, making it ideal for those who prioritize maintenance-free operation. Compared to the Kidde smart model, it lacks connectivity but excels in reliability for homes that prefer a straightforward alarm. Its photoelectric smoke sensor and electrochemical CO detection ensure quick responses, yet the absence of wireless interconnection means it doesn’t provide coverage across multiple rooms without additional units. This model suits users who want long-term, hassle-free safety without smart features, but it might not fit households seeking integrated alerts or remote monitoring.
Pros:- Long-lasting sealed lithium battery for a decade of maintenance-free operation
- Dual smoke and CO detection with fast response sensors
- Easy to install without rewiring
- UL safety certification ensures reliable performance
Cons:- No wireless interconnection or Wi-Fi support
- Limited to standalone operation, less flexible for larger homes
Best for: Homeowners who prefer a maintenance-free, reliable alarm without smart connectivity.
Not ideal for: Tech enthusiasts wanting smart alerts or remote monitoring capabilities, or larger homes requiring interconnected systems.
- Model Number:SC07
- Battery Life:10 years
- Sensor Type:Photoelectric Smoke Sensor, Electrochemical CO Sensor
- Certification:UL 217 & UL 2034
- Included Items:Alarm, User Manual, Screws, Anchors
Our verdict“This detector offers a dependable, low-maintenance solution for those who value simplicity and longevity over smart features.”
First Alert SC5 Battery Smart Smoke & Carbon Monoxide Alarm
This First Alert SC5 is tailored for users who already use Google’s Nest ecosystem, providing seamless smart alerts to phones and voice notifications. Its interconnectivity and voice alerts enhance safety, especially in larger homes where one alarm’s detection triggers others. Compared with the Kidde Smart CO Detector, which also offers smart features, the SC5’s integration with Nest makes setup and management more straightforward for Google users. However, it relies heavily on Wi-Fi, and full functionality depends on the app, which could be a drawback during connectivity issues. This pick is ideal for Nest users wanting a smart, interconnected smoke and CO alarm with clear voice warnings.
Pros:- Smart alerts sent directly to your phone
- Interconnects with other compatible alarms
- Voice alerts provide clear warnings
- Precision detection reduces false alarms
Cons:- Dependent on Wi-Fi connection for full functionality
- Requires smartphone app for setup and notifications
Best for: Nest ecosystem users seeking a smart, voice-enabled smoke and CO detector with seamless alerts.
Not ideal for: Apple HomeKit users or those preferring standalone alarms without smart home reliance.
- Compatibility:Google’s Nest Protect
- Features:Smart alerts, interconnectivity, voice alerts, low battery notification
Our verdict“This smart alarm is best for Google Nest fans who want integrated, voice-enabled safety alerts across their home.”
X-Sense Wireless Combination Smoke and CO Detector, XP0H-WN, 3-Pack
This 3-pack from X-Sense offers a balanced mix of reliability and user convenience, featuring a 10-year sealed battery and large LCD displays that show real-time CO levels and device status. It’s ideal for homeowners who want to cover multiple rooms efficiently, especially compared to single units like the Kidde Smart CO Detector which lacks interconnection. The LCD display improves accessibility, though it may be hard to read in bright lighting, and the units need wall or ceiling mounting, which might not suit all spaces. This pack suits those seeking a straightforward, interconnected safety system that’s easy to install and monitor.
Pros:- Long-lasting 10-year sealed battery reduces maintenance
- Wireless interconnection for comprehensive coverage
- Large LCD display shows CO levels and device status
- Easy to install without rewiring
Cons:- Requires wall or ceiling mounting, which may not fit all spaces
- LCD display can be difficult to read in bright light
Best for: Homeowners wanting reliable, interconnected alarms for multiple rooms with clear status updates.
Not ideal for: Users with very bright or highly reflective spaces where LCD readability may be compromised, or those desiring Wi-Fi connectivity.
- Model Number:XP0H-WN
- Unit Count:3
- Battery Life:10 years
- Alarm Type:Combination Smoke and CO
- Standards:UL 217 & UL 2034
- Built-In Media:User Manual, 3 alarms, screws, and anchors
Our verdict“This pack offers a practical, interconnected safety solution for larger homes with a focus on easy monitoring and installation.”
X-Sense 3-Pack Interconnected Smoke and CO Detector, SC06-W
This X-Sense SC06-W set emphasizes seamless interconnection among units, supporting up to 18 devices wirelessly, making it suitable for larger or multi-level homes seeking reliable, synchronized alerts. Compared to the 3-pack XP0H-WN, its wireless interconnection offers a broader coverage option without the need for physical wiring, but it doesn’t include Wi-Fi connectivity for remote alerts. Its 10-year sealed battery guarantees long-term operation, yet the limited pack size might require additional units for extensive homes. Overall, this system is ideal for those prioritizing wireless interconnectivity over smart features like app notifications.
Pros:- Long-lasting 10-year sealed battery reduces maintenance
- Wireless interconnection supports up to 18 devices
- Easy to install without rewiring
- UL safety certification ensures reliable performance
Cons:- No Wi-Fi connectivity limits remote alerting
- Supports only 3 units per pack, may require additional sets for larger homes
Best for: Homeowners who want a flexible, wireless interconnected system without Wi-Fi dependency for multi-room safety.
Not ideal for: Those seeking remote monitoring via smartphone or smart home voice assistants, as it lacks Wi-Fi functionality.
- Battery Life:10 years
- Interconnection:Wireless, up to 18 devices
- Alarm Type:2-in-1 smoke & CO
- Certification:UL 217 & UL 2034
- Package Quantity:3
Our verdict“This wireless interconnection system is ideal for users wanting reliable, synchronized alarms across multiple rooms without relying on Wi-Fi or smart integrations.”
Kidde Smart Smoke & CO Detector with Ring
This detector shines by combining dual smoke and CO detection with seamless integration into the Ring ecosystem. Its real-time notifications via the Ring app and Alexa make it ideal for those already invested in Ring’s smart home environment. Compared to the Kidde Wi-Fi model, it offers more comprehensive alerts through its app but depends on a separate Ring subscription for full monitoring. Its battery operation simplifies installation, but the batteries need regular replacement, and it lacks wired backup. This pick makes the most sense for Ring users seeking an integrated safety system that alerts everyone in the house instantly.
Pros:- Dual detection of smoke and carbon monoxide for comprehensive safety
- Wireless interconnectivity with other Kidde alarms for whole-home alerts
- Real-time notifications via Ring app and Alexa enhance responsiveness
Cons:- Requires a Ring subscription for advanced monitoring features
- Dependent on battery life, so regular replacement is necessary
- No wired connection option for continuous power
Best for: Homeowners already using Ring security products who want a simple, wireless smoke and CO detector with smart alerts
Not ideal for: Users without Ring devices or those seeking wired solutions, since it lacks wired backup and full smart monitoring without a subscription
- Detection:Smoke and CO
- Battery:2 AA alkaline batteries (included)
- Connectivity:Whole home smart connectivity, Ring app, Alexa
- Standards:UL 217, FCC
- Subscription:Optional Ring subscription for $5/month
Our verdict“Ideal for Ring ecosystem users wanting a wireless, connected smoke and CO detector with instant alerts.”
Kidde Hardwired App Enabled Smart Smoke and Carbon Monoxide Detector
This model offers a step up with its wired power source combined with Wi-Fi connectivity, making it suitable for permanent installations. Its enhanced sensing technology provides faster alerts for smoke and CO, which is a key advantage over battery-only models like the Kidde 30CUDR. While setup is straightforward, some users may find the Wi-Fi connection process a bit complex, especially during initial configuration. Compared to the wireless-only X-Sense SC07-W, this detector provides more reliable power and faster detection, but it demands a wired connection, limiting flexibility in certain locations. It’s best for homeowners who want a reliable, wired smart detector with mobile alerts.
Pros:- Provides real-time mobile alerts for smoke and CO hazards
- Enhanced sensing technology for faster detection and fewer false alarms
- Easy Wi-Fi setup with dedicated Kidde app for remote management
Cons:- Requires home wiring, limiting placement options
- Setup process can be complex for non-technical users
- Dependent on Wi-Fi stability for full smart features
Best for: Homeowners with existing wired systems seeking a smart, fast-responding smoke and CO detector
Not ideal for: Renters or those in apartments without wiring modifications, since it requires 120V wiring setup
- Power Source:120V AC with two AA backup batteries
- Connectivity:Wi-Fi (2.4 GHz)
- Detection Technology:Enhanced sensing for smoke and CO
- Alarm Type:Interconnected smart alarms
- Voice Alerts:Yes
Our verdict“Best suited for wired home setups where fast detection and reliable connectivity are priorities.”
X-Sense Interconnected Smoke and CO Detector, SC07-W (3-Pack)
The X-Sense SC07-W offers a 10-year sealed battery, eliminating worries about frequent replacements, which makes it stand out among battery-powered units like the Kidde 30CUDR. Its wireless interconnection supports coverage across multiple floors, ideal for larger homes. While it doesn’t include Wi-Fi, its simple setup and UL certification make it reliable for whole-house safety. Compared with the X-Sense SC01-W 6-pack, this model provides a longer-lasting power source, but it’s limited to wireless interconnection without app-based smart features. It’s best for those wanting a maintenance-free, interconnected system with long-term peace of mind.
Pros:- Long-lasting 10-year sealed battery reduces maintenance
- Wireless interconnection ensures alerts throughout the house
- Easy to install with included hardware and UL certification
Cons:- No Wi-Fi or app integration for remote notifications
- Limited to X-Sense compatible alarms for interconnection
- Interconnection range may be insufficient for very large homes
Best for: Homeowners seeking a maintenance-free, interconnected smoke and CO system with long battery life
Not ideal for: Tech enthusiasts wanting Wi-Fi connectivity or app-based control, since it lacks Wi-Fi features
- Battery Life:10 years
- Interconnection:Wireless up to 820 ft
- Sensors:Photoelectric smoke, electrochemical CO
- Quantity:3 units
- Warranty:5-year
Our verdict“Ideal for users who prioritize long-term, maintenance-free interconnected alarms over smart home integration.”
Kidde Smoke & Carbon Monoxide Detector, AA Battery-Powered, 30CUDR-VRF
The Kidde 30CUDR-VRF is a straightforward, battery-powered detector that emphasizes ease of installation and reliable alerting. Its dual sensors provide over 25% faster detection, making it a strong choice over simpler battery alarms. The voice alerts clearly announce the hazard type, which is helpful for quick response. While it offers wireless interconnection for up to 12 alarms, it doesn’t include smart home features or app control, making it less suitable for tech-savvy users. Compared to the Wi-Fi-enabled Kidde model, this one offers simplicity and affordability without sacrificing safety. This detector is best for residents who want a dependable, easy-to-install alarm with long-term performance.
Pros:- Easy to install with batteries and no wiring needed
- Wireless interconnect links alarms for whole-home safety
- Clear voice alerts announce hazard type for quick action
Cons:- Requires replacement after 10 years of battery life
- Limited to Kidde alarms for interconnection, no smart home integration
- No remote control or app monitoring features
Best for: Homeowners seeking a simple, battery-operated smoke and CO detector with voice alerts and interconnectivity
Not ideal for: Smart home enthusiasts or those wanting app control, as it lacks Wi-Fi or smart features
- Detection Type:2-in-1 smoke and CO
- Power Source:2 AA batteries (included)
- Alarm Decibel:85 dB
- Interconnect:Wire-free, up to 12 alarms
- Detection Speed:Over 25% faster
Our verdict“Best for users wanting a simple, reliable alarm with voice alerts and wireless interconnection without smart features.”
X-Sense Interconnected Smoke and CO Detector Combo, SC01-W, 6-Pack
This 6-pack of detectors offers a cost-effective solution for comprehensive home safety with 10-year sealed lithium batteries, removing the hassle of replacements. Its wireless interconnection covers entire homes, and UL certification confirms safety standards. The large mounting brackets simplify installation, and the inclusion of test and silence functions boosts user convenience. Unlike the SC07-W, which offers a longer battery life, these units are limited to smoke and CO detection without app-based smart features, but their affordability and ease of setup make them attractive for budget-conscious buyers. They are best suited for those wanting a straightforward, long-term interconnected system that covers multiple floors efficiently.
Pros:- Sealed 10-year lithium batteries eliminate need for replacements
- Wireless interconnection ensures synchronized alerts across the house
- UL certified for safety and easy to install
Cons:- No Wi-Fi or app integration for remote monitoring
- Limited to smoke and CO detection only, no smart home features
- Requires replacement after 10 years, no rechargeable option
Best for: Budget-conscious homeowners wanting a whole-house, maintenance-free smoke and CO detection system
Not ideal for: Users seeking app-based control, smart notifications, or Wi-Fi connectivity, as these models lack such features
- Battery Life:10 years
- Interconnection:Wireless
- Protection:Smoke and CO
- Certification:UL 217 & UL 2034
- Quantity:6 units
Our verdict“Ideal for those who prioritize long-term, maintenance-free coverage without the need for smart features or app control.”
How We Picked
These products were evaluated based on their detection accuracy, smart home integration, ease of installation, battery life, and overall build quality. We prioritized models that offer reliable performance and real-time notifications, as these are critical for safety. Interconnectivity was a key factor, especially for larger setups, while user interface and app usability shaped our picks for convenience. Cost was also considered, with an emphasis on balancing features against value. The rankings reflect which detectors deliver the best combination of safety, connectivity, and ease of use for different types of buyers.Factors to Consider When Choosing Best Smart Smoke And Co Detector
Choosing the best smart smoke and CO detector involves more than just reading specs. It’s important to consider how each device integrates with your existing smart home setup, its power source, and how user-friendly it is. Additional features like voice alerts or indoor air quality monitoring can add significant value but may also increase the price. Being aware of common pitfalls, such as opting for models without reliable app connectivity or poor battery life, can help prevent future frustrations. Here are key factors to keep in mind:Detection Reliability and Accuracy
Reliable detection is the foundation of any safety device. Look for models with proven sensors that accurately identify smoke and CO without frequent false alarms. Some detectors include dual sensors or advanced technology to improve accuracy. Remember, even the best smart features won’t matter if the device fails to alert you during an emergency. Investing in reputable brands with positive safety reviews is a good rule of thumb.
Smart Home Integration
Compatibility with your existing smart home ecosystem—such as Alexa, Google Assistant, or Apple HomeKit—can make managing safety devices more streamlined. Some detectors send alerts directly to your phone, while others can trigger smart lights or alarms as part of a broader safety system. Be cautious about choosing models that promise connectivity but lack stable app performance or reliable notifications. Compatibility and ease of integration are key for a seamless experience.
Power Source and Installation
Battery-powered detectors provide flexibility and are easier to install in various locations, but they require regular battery replacements. Hardwired units often integrate with home wiring and can include backup batteries, offering continuous operation during outages. Consider your home’s electrical setup and your willingness to perform maintenance when choosing between these options. Interconnected hardwired systems can provide broader coverage but tend to be more complex to install.
Additional Features and User Experience
Features like voice alerts, indoor air quality monitoring, and multiple alert modes enhance safety and usability. However, more features often come at a higher cost and may complicate setup. Evaluate whether these extras align with your needs and comfort with technology. A simple, reliable detector might suit beginners or those who prefer a straightforward safety device, while tech enthusiasts might value advanced monitoring and remote controls.
Price and Long-term Value
Smart detectors range from budget-friendly to premium models with extensive features. Cheaper options may lack certain integrations or have shorter lifespans, but they can still provide essential safety functions. Investing in a more expensive model often yields better durability, more reliable alerts, and richer connectivity options. Consider your budget and weigh the added features against their real utility in your home environment.
Frequently Asked Questions
Do smart smoke and CO detectors require professional installation?
Many smart detectors are designed for DIY installation, especially battery-powered models, which often come with straightforward mounting kits. Hardwired units may require some basic electrical work or professional help, particularly if they need integration with existing wiring or a smart home system. Always follow the manufacturer’s instructions, and if unsure, consulting an electrician can ensure safety and proper setup. Proper installation is essential to ensure the device functions correctly and provides reliable alerts when needed.
How often should I replace the batteries in a smart smoke and CO detector?
Most battery-powered detectors need new batteries roughly once a year, though some models have long-life lithium batteries that last up to 10 years. Regularly testing your device and replacing batteries promptly ensures consistent operation. For hardwired models with backup batteries, check the battery status during routine maintenance or annual testing. Neglecting to replace batteries can lead to false alarms or silent failures during emergencies.
Can smart smoke and CO detectors be integrated with existing smart home systems?
Yes, many models are compatible with popular platforms like Alexa, Google Assistant, or Apple HomeKit. When selecting a device, verify its compatibility and whether it supports remote notifications, voice alerts, or automation routines. Proper integration allows you to receive alerts on your phone, trigger other smart devices, or even silence alarms remotely. Compatibility can vary, so review the manufacturer’s specifications to avoid surprises after purchase.
What features should I prioritize if I live in a large home?
In larger residences, interconnectivity becomes essential, allowing alarms to trigger throughout the house if one detects smoke or CO. Look for models that support multiple units and easy setup of interconnected detectors. Voice alerts and app notifications become more valuable for ensuring everyone is aware, especially in noisy or multi-story environments. Investing in a system with a broad coverage area can significantly improve safety and peace of mind.
Are there smart smoke and CO detectors suitable for renters or temporary residences?
Battery-powered, wireless models are ideal for renters or those in temporary housing since they require no wiring and are easy to move. Look for detectors with long-lasting batteries and straightforward mounting options. Smart features like app alerts and voice notifications add convenience, especially if you’re away from home frequently. Choosing a device that’s easy to install and remove without damaging walls can make it practical for temporary setups.
Conclusion
The best overall pick for most homeowners remains the Kidde Smart CO Detector + Indoor Air Quality thanks to its reliable detection and air quality monitoring. If you want the best value, the First Alert SC5 offers solid safety features at a budget-friendly price. For those seeking a premium experience with seamless smart home integration, the Kidde Smart Smoke & CO Detector with Ring stands out. Beginners or renters should focus on battery-powered, easy-to-install options, while larger households will benefit from interconnected models like the X-Sense Wireless Combination Detector. Understanding your specific needs and home setup will help you choose the safest, most reliable detector for 2026.
