Feature:[High Sensitivity Dual Sensor Design]Carbon Monoxide fire alarm is a Catalytic Combustion Method Sensor and the Electrochemical Carbon Monoxide Sensor; Protect yourself and your family from two deadly threats. When dangerous concentrations of Carbon Monoxide or Explosive 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.