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- The First Alert® CO710 Carbon Monoxide Alarm with 10-year battery and digital temperature display provides convenient and reliable carbon monoxide protection. This carbon monoxide detector does not require installation – simply place on a tabletop or shelf throughout your home or with you on the go. The built-in 10-year lithium battery means you don't need to worry about changing batteries or low battery chirps during the lifetime of the detector. This stylish CO monitor also has a backlit digital display that shows temperature and CO concentration when detected.