The Kidde P3010H is a 10-year sealed battery smoke alarm with photoelectric sensing technology and Smart Hush feature. When smoke or fire is detected the 85dB alarm tone is accompanied by illumination of bright LEDs to help provide a lighted escape path. The alarm will automatically activate when it is attached to the mounting bracket; there are no pull-tabs no switches everything is automatic. At the end of 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 chirp and making it safe for disposal.