... electrochemistry carbon,monoxide sensor,it more accurate,more credibility,good at refrain. 6Superbright LBD display:flash every 30 seconds,When ... it at standby status,flash quickly when CO leakage. 7Lound buzzer output: 85db at 3M distance8Low voltage test6. ... electric radiator, water heater.So to be safty,we suggest you to install CO alarm in kitchen,wash room,dinning room,bedroom ...