Model number PRC710; Low-profile smoke & carbon monoxide alarm detects 2 potentially deadly threats; Slim, easy-to-install design is half as thick as standard alarms; Built-in 10-year Li-Ion battery offers continuous power for the life of the alarm; Photoelectric sensor detects smoke & electrochemical sensor alerts if dangerous carbon monoxide levels are detected; Mounts unobtrusively on the ceiling or wall; 10-year limited warranty; Includes mounting bracket;