Because carbon monoxide is slightly lighter than air and also because it may be found with warm, rising air, detectors should be placed on a wall about 5 feet above the floor. The detector may be placed on the ceiling. Do not place the detector right next to or over a fireplace or flame-producing appliance. Keep the detector out of the way of pets and children. Each floor needs a separate detector. If you are getting a single carbon monoxide detector, place it near the sleeping area and make certain the alarm is loud enough to wake you up.
 
Power supply: Built-in lithium battery, 10 years battery life time
Confirm to EN50291-1: 2018
Sensor type: Electrochemical
Alarm volume: ≥85dB at 3m
Silence function: Approx. 8 mins
Low battery signal alarm
Product life time≥ 10 years
Desk stand feature
Size: 93*93*30mm
EN50291-1:2018/UKCA Certificate