First Alert Smoke Detector, 85dB, 9V dc

With 5 year manufacturer's warranty, the SA300UK is a great value battery powered ionisation smoke alarm.The alarm benefits from both test and hush button facility, making it easy to check functionality and silence false alarms.

Ionisation smoke sensor - quick to detect fast flaming fires
9V alkaline battery powered (battery included)
5 year warranty
Test/hush button feature
Provides a low battery warning chirp to indicate when the battery needs replacing
Sound output: 85dB audible alarm when activated