Informative LCDThis sleek, fully-featured CO alarm is equipped with a backlit LCD and 3 colored LEDs for an at-a-glance status check. The informative LCD shows real-time CO concentration, battery level, and working status, taking out any guesswork in reading the alarm status. | Faster Response to CO LevelsMeasuring CO levels from 30 to 999 ppm, this alarm quickly informs you of real-time CO concentration in the surrounding air and will respond within 4-15 minutes if the concentration level exceeds 400 ppm, giving you the earliest possible warning of potential danger. | Loud 85-dB AlarmFor your safety, this carbon monoxide unit will emit an 85-dB alarm, warning you of potential danger. In addition, all other units in the interconnected network will also alarm in an emergency to ensure maximum awareness throughout your home. | Easy to InstallThe battery-operated CO detector requires no AC wiring or power outlets, making it easy to install multiple alarms in your home to create a safety network. All mounting hardware (screws, anchor plugs, and 1.5 V AA batteries) is provided for fast, simple installation in minutes! |