The Kidde P3010L is a 10-year, sealed battery, smoke alarmwith photoelectric sensing technology and Smart Hush feature.The innovative design allows for automatic activation oncethe unit is attached to the mounting bracket; there are nopull-tabs, no switches, everything is automatic. At the end ofalarm life, the unit will chirp, indicating the alarm is in needof replacement. The customer can use a simple tool such as ascrewdriver to deactivate the unit, stopping the chirp and makingit safe for disposal. The P3010H contains a 10-year tamper proof battery that eliminates the need for battery replacement, and ends worry over unauthorized battery removal. The alarm provides continuousprotection smoke and fire, even during power outages.