X-Sense XC04-WX standalone CO detector with a Figaro sensor that can be easily connected to a 2,4GHz Wi-Fi network and the free X-Sense Home Security mobile app. Receive instant notifications for alarms, faults and low battery levels, wherever you are. You can also easily test the detector from the app. The connection to the app can be established without a Base Station or Gateway. You can add up to 24 XC04-WX detectors to the app. The large LCD screen clearly displays the carbon monoxide level detected by the detector, ranging from 30 to 999 ppm, whilst an 85-decibel alarm is ready to warn you if the level becomes dangerous. An LED also flashes to indicate the alarm status. Operates on a replaceable CR123a battery. EN 50291-1:2018 certified.