Feature:[High Sensitivity Dual Sensor Design]Carbon Monoxide fire alarm is a Catalytic Combustion Sensor and the Electrochemical Carbon Monoxide Sensor; Protect yourself and your family from two deadly threats. When dangerous concentrations of Carbon Monoxide or gases are detected, notify you immediately to save your life in the first place. [Easy To Use]Push/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 Gas that the unit has detected and stored-- from 0 to 3000 ppm--and it updates every 9 seconds to indicate any sudden changes. [Voice Alarm]When the concentration of Carbon Monoxide reaches 100PPM or the concentration of Combustible gas 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, Germany, France, Spain, Italy and so on Voltage: AC220V Material: Plastic colour: As shown Package Contents: 1 x Safety alarm sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.