Feature:[High Sensitivity Dual Sensor Design]Carbon Monoxide fire alarm is a Catalytic Combustion Sensor and the Electrochemical Carbon Monoxide Sensor; yourself and your family from two deadly threats. When dangerous concentrations of Carbon Monoxide or gases are detected, you immediately to save your life in the first place. [Easy To Use]/test button - Connect to power 90V-240V or 9V rechargeable battery(not included), The detector will display 3 minutes counting. [LCD Digital Display]This display clearly shows levels of that the unit has detected and stored-- from 0 to 3000 ppm--and it updates 9 seconds to indicate any sudden changes. [Voice Alarm]When the concentration of Carbon Monoxide reaches 100PPM or the concentration of Combustible reaches 6%, the LCD screen begins to display the concentration value, and the red LED lights flash and emit a loud voice alarm mode -- 85 decibel alarm. [Easy Installation & Quality]Easy to mount on any wall or ceiling without an electrician. Plug Type:EU Plug,it applies to Indonesia, , , , and so on Voltage: AC220V Material: Plastic colour: As shown Package Contents: 1 x Safety alarm sensor Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real . The measurement allowed error is +/- 1-3cm.