X-Sense 10-Year Battery Smoke and Carbon Monoxide Detector with LCD Display, Dual Sensor Smoke and CO Alarm, Auto-Check, SC08, 1-Pack

Protection from Two Deadly Threats: One alarm protects against both dangerous smoke and carbon monoxide (CO) in the surrounding air; accurately detects CO from any potential sources; upgraded photoelectric and electrochemical sensors significantly increase the alarm’s sensitivity, enabling faster response times
10-Year Battery-Operated Smoke & CO Alarm: A sealed lithium battery enables the unit to monitor your home 24/7, keeping you and your family safe and sound for up to a decade without frequent battery replacement; a low battery warning indicates the unit is coming to its end of life
Practical LCD Display: Clearly displays real-time CO levels above 30 ppm (parts per million) taken from the surrounding air, as well as the status of the alarm’s battery level
Faster Response to Dangers with Loud 85 dB Alarm: Gives you the earliest possible warning of smoke and CO threat with both a loud 85 dB alarm and a rapid flashing red LED indicator; this alarm is sure to wake up you and your family, even when sound asleep
Simple Installation & Operation: Battery-operated unit installs quickly and easily without an electrician; one-button operation to test or silence the alarm