First Alert PR700LB Smoke Alarm, 9V Lithium,5-13/64"

The PR700LB is a state of the art smoke alarm designed to provide early warning of a fire. It features a fully insect screened Photoelectric smoke sensing chamber, an 85dB horn, a supervised 9V battery power supply, a full function test switch, a silence feature to silence unwanted nuisance alarms, a red LED light that indicates DC power or alarm. It also features a tamper resistant locking pin that locks alarm to the mounting bracket to prevent removal of battery or alarm. Perfect for apartment, dormitory or hotel applications. The sleek, low profile design complements any décor. When voltage drops to a pre-set warning level, the horn will beep approximately once per minute to indicate a fresh battery is required. Designed for wall or ceiling mounting. Includes mounting anchors and screws.