X-Sense 10-Year Battery Combination Smoke Carbon Monoxide Alarm Detector with Large LCD Display (Standalone Model)

2-in-1 Protection: The combination smoke and CO detector detects both smoke and carbon monoxide faster and more accurately using a photoelectric smoke sensor and an electrochemical CO sensor
10-Year Battery: The fire and CO alarm is built with a sealed lithium battery that provides 10 years of continuous power, saving you from changing batteries and power outage
Combination Alarm with CO Readings: The informative LCD will show you the battery level and real-time CO levels in PPM (parts per million)