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.

Product Details

• 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
• Features
• Ionization sensor reliably detects flaming fires
• Gasket-less for easy installation
• Battery backup for detection during a power outage
• Works in tandem with other First Alert alarms
• Ionization smoke sensor is optimal for detecting fast flaming fires
• Tamper-resistant locking pins
• Single button silence/test
• Open mounting design for easy installation with side load battery compartment
• Interconnectable up to 18 units such as 12 smoke and 6 CO/heat/relay
• Emits T3 pattern