The Kidde 0910CA is a 10-year, sealed battery, single station smoke alarm. The 0910CA will automatically activate when it is attached to the mounting bracket. There are no pulltabs, no switches, everything is automatic. At the end of the alarm life, the unit will chirp, indicating the alarm is in need of replacement. The customer can use a simple tool such as a screwdriver to deactivate the unit, stopping the low battery chirp and making it safe for disposal.