The FireAngel Digital Carbon Monoxide Alarm has a digital display to monitor levels of this deadly gas. It is powered by a sealed seven-year battery, after which the entire unit should be replaced. With a stylish black design, the alarm has a built-in temperature indicator. It will sound a shrill alarm if any carbon monoxide is detected from faulty ovens, boilers or any other household appliances. Features and Benefits Safe - This carbon monoxide alarm has a built-in alarm and a seven-year guarantee. Stylish - The alarm has a smart black finish. What's Included Carbon monoxide alarm with sealed battery Specifications Dimensions: H7.4 x W12.5 x D3.9cm Weight: 120g Colour: Black