Ademco Inc. 7010B6CP Photo/Smoke Alarm 6 Pack

Frist alert, 6 pack, hardwire photoelectric smoke alarm with battery back up, contractor pack, 120v single or multiple station smoke alarm designed for residential home use & institutional locations such as hospitals, hotels, motels, dormitories & other multiple family dwellings, interconnect able & can be installed & linked with up to 18 compatible devices, up to 12 smoke alarms & 6 compatible devices like bells, horns & repeaters, so that when one triggers, all alarms sound, emits loud 85db audible alarm, photoelectric smoke sensor, which is particularly effective at detecting slow smoldering fires, single test/silence button silences a non-threatening alarm or low battery warning, plus allows you to test the unit's functionality quickly.