120V, Pro Basic Direct Wire Smoke Detector, Photoelectric Sensor, Professional AC Basic Smoke Detector With 9V DC Battery Back Up, Quick Connect Power Harness, Multi-Station Interconnectable, 5 Year Warranty, Boxed.
Photoelectric sensing technology
One button design, operates hush and test
Large mounting base, 9V battery backup included
Tamper resist feature
Pre-stripped wiring harness with tinned strands