The Kidde i1040 is a 10-year, sealed battery, ionization, smoke alarm with Alarm Memory and Hush® feature. The i1040 alarm will automatically activate when it is attached to the mounting bracket, there are no pull-tabs, no switches, everything is automatic. When the unit reaches low battery condition (approx 10 years after power up), it 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. The sealed-in board-mounted battery will power the i1040 unit for its complete 10-year life. No replacement battery will ever be needed. This alarm uses ionization sensing technology. Ionization sensing alarms may detect invisible fire particles (associated with flaming fires) sooner than photoelectric alarms. Photoelectric sensing alarms may detect visible particles (associated with smoldering fires) sooner than ionization alarms. Leading authorities recommend that both ionization and photoelectric smoke alarms be installed to help ensure maximum detection of the various types of fire that can occur within the home. The Kidde i1040 sealed battery operated smoke alarm features a self-activation mechanism making installation simple and easy. It also has a Hush® feature allowing consumers to temporarily silence nuisance alarms and a low battery alert indicating it is time to replace the alarm. At the end of the alarm’s 10-year life, deactivation of the alarm is just as easy. Using a tool such as a small screwdriver, a deactivation switch removes power from the alarm and renders the battery safe for disposal. The alarm lockout feature mechanically prevents a deactivated unit from being mounted back on the mounting bracket.