Electromechanical alarm with LCD display and integrated 10 Year battery that saves lives by detecting carbon monoxide gas and giving a loud acoustic warning when triggered. This unit needs no battery maintenance, simply engage the internal battery by releasing the button on the base of the unit, fix to your desired surface and test on a regular basis. Once the detector nears the end of its 10 year life, a low battery indication alerts you to replace the unit. An essential life saver needed in every household with gas or solid fuel heating. Recommended positioning, in all rooms with boilers, stoves or open fires.Apparatus: Type BvbCrLfBatteries: DC3V 2pcs lithium battery (internal)vbCrLfAlarm level: 85dB @ 3mvbCrLfSensor: ElectromechanicalvbCrLfOperating temperature: -10°C to +50°vbCrLfLifetime: 10 yearsvbCrLfHumidity: 10% - 95%RHvbCrLfDimensions: 130 x 75 x 35mmvbCrLfWeight: 130g