$10 · Kidde 120V Photoelectric Smoke Detector

-Kidde Photoelectric Smoke Alarm -120V AC direct-wire interconnects with up to 24 units, of which 18 can be initiating -AA battery backup (included) provides continuous protection in case of power failure These are good until 2029. I purchased, installed and removed due to renovation. They are in excellent like new working condition. These retail for $30.00 each new. Asking $10.00 each or $50.00 for the lot of 6 Also have 4 Kidde Talking Smoke/Carbon Monoxide Combo Detector (see my other add)