Bosch EN1244 Smoke detector F.01U.343.570

Fully supervised transmitter to maximize reliability Built-in sounder for alarm alerts Self-monitoring for smoke sensor maintenance Removable smoke sensor chamber for easy cleaning Tamper switch to detect removal from mounting surface Dimensions Detector: 5.3 in. x 2.3 in. (13.5 cm x 5.8 cm) Weight 8.5 oz (without battery) Smoke detector sensitivity 2% per ft. obscuration, nominal Drift compensation Automatic Alarm sounder 85 dB @ 3 m, temporal output Frequency (operating) 902 MHz to 928 MHz Temperature (operating) -0°C to +50°C (+32°F to +120°F) Voltage One 3.0 V battery Battery life 3 to 5 years. Typical battery life shown is for supervised operation using recommended check-in times.