first alert 9120b smoke alarm, 120 v, ionization sensor, 85 db, white

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.

• 120 V hardwired smoke alarm wires directly into your home's electrical system
• Ionization smoke sensor is optimal for detecting fast flaming fires
• Gasket-less mount system for hassle-free installation
• Easy-to-access battery drawer
• Can integrate with up to 12 other first alert or BRK hardwired smoke detectors
• Battery backup for detection during a power outage
• Tamper-resistant locking pins
• Interconnectable up to 18 units such as 12 smoke and 6 CO/heat/relay
• Emits T3 pattern

• Owners/User Manual https://assets.unilogcorp.com/187/ITEM/DOC/FIRST_ALERT_100078475_Owners_User_Manual.pdf