Kidde Smoke Detector, Hardwired-2 pk

Ionization sensing technology - hardwired smoke detector detects visible fire particles, 85 decibel alarm alerts of fire Protects during a power failure - smoke alarm operates on a 120V power source with 3V lithium battery backup Whole home family protection - place 1 fire detector on each level of your home & in your bedroom - maximum of 24 Kidde smoke or CO detectors can be interconnected in a multiple stations Test-Hush Feature - silences the unit for approximately 9 minutes