AEGISLINK Smoke Carbon Monoxide Detector, Interlinked Combination Smoke CO Alarm, Battery Powered, Wireless Interconnected, Digital Display, SC-RF220, 10-Pack RF Interlinked 10-Pack

This combination smoke and carbon monoxide alarm features photoelectric and electrochemical sensors that detect smoke and carbon monoxide, giving you and your family dual protection
When one device senses a dangerous situation, all the interconnected devices go off, so you’ll be alerted throughout your home
For full coverage of your home, you can connect up to 24 AEGISLINK wireless interlinked devices, which gives your home comprehensive protection
You can customize your network by adding new devices to the existing network or disconnecting devices and creating new networks
The easy-to-read LCD displays the level in real time at CO as well as the battery life, so you are alerted to dangerous CO levels and know when to replace the battery
This smoke and carbon monoxide detector has a replaceable lithium battery; the low-battery feature warns you when the battery needs replacing so your home has uninterrupted smoke and CO detection
With an open-air transmission range of over 820 ft (250 m), it provides smooth communication between interconnected alarms, ensuring the entire home is protected with no blind spots