Kidde Quick Connect Smoke Detector Adapter Plug simplifies hardwired alarm installation by eliminating rewiring and wire stripping. This adapter connects your existing 120V tail peice  to be compatible with Kidde smoke, carbon monoxide, or combination detectors in four easy steps. Compatible with most Kidde models and supports interconnection of up to 24 alarms. Ideal for retrofitting older homes or upgrading existing systems. Includes 10-year limited warranty.