Kidde Carbon Monoxide Alarm with digital display is Sleek, lightweight CO alarm with a non-replaceable, sealed-in Lithium battery for ten years of continuous protection and meaning the user never needs to change the battery for the full duration of the alarm’s life. Ideal for use in all living areas and can be installed on the wall, where the digital display can easily be seen or used freestanding on a table or shelf. It is also conveniently portable so can be taken away on holidays for added peace-of-mind.