Carbon monoxide detector for home and travel: The NM-CO-10X can be mounted on walls and free-standing It quickly detects invisible CO hazards, alerts with an 85dB loud sound, and provides advanced protection on the go. Advanced sensor: the CO meter has an optimised electrochemical sensor for early detection. CO is colorless, odorless and deadly; early evacuation can prevent poisoning. 10-YEAR BATTERY: FireAngel CO detectors have a sealed 10-year battery. When the battery is low, the alarm "chirps/beeps" at regular intervals. Wireless: The NM-CO-10X works independently, but can be integrated into a wireless intelligent detector network with separately available wireless module. If an alarm is triggered, all detectors will sound. Sleep easy function: when the battery is low, press "test/mute" button to mute the CO sensor for 8 hours without turning it off., Weight: 0.32628414776 pounds, Manufacturer: FireAngel Safety Technology Ltd.