Designed to help promote household safety, the First Alert 9120B hardwired smoke alarm with battery backup can provide a vital early warning of fire. This hardwired smoke detector uses an ionization smoke sensor to reliably detect smoke from hot, fast-flaming fires.
California residents see Prop 65 WARNINGS
| Dimensions | : | 5.6 in L x 1.9 in W x 5.6 in H |
| Includes | : | 9 V Battery |
| Operating Temperature | : | 40 to 100 deg F |
| Power Supply | : | 120 V |
| Sensor Type | : | Ionization |
| Sound Level | : | 85 dB |
Owners/User Manual