First Alert 10-Year Battery 2-Pack Battery-operated Photoelectric Sensor Smoke Detector Item #749769 | Model #WS84503 Thermoplastic top and backbody are

Thermoplastic top and backbody are virtually unbreakable to deliver years of durable performance

stapled fibers with flagging to allow the broom to pick up finer particles

Eliminate the need for compressors

The box allows for easy valve access and operation and can be mounted to the left or right of the stud bay and needs no additional support framing

Replaceable seats and seat discs

First Alert 10-Year Battery 2-Pack Battery-operated Photoelectric Sensor Smoke Detector Item #749769 | Model #WS84503 Thermoplastic top and backbody areThe First Alert SM210 10 Year Sealed Battery Smoke Alarm with Slim Profile Design is available in a convenient two pack. The SM210 smoke alarm features First Alert's Precision Detection advance sensing technology and meets new industry standards. This slim profile alarm is easy to install, and the 10 year sealed battery means no battery replacements are required. Precision Detection technology helps reduce cooking nuisance alarms and provides early