First Alert 9120B BRK Hardwire Smoke Alarm with Battery Backup
• 120V AC with battery backup
• Side load battery drawer
• Tamper resistant locking pins - Universal mounting bracket
• Test/silence button
• Latching alarm indication
The 120V AC Smoke Alarm with Battery Backup is designed to install faster; perform better; and be even smarter than before. Ionization sensor. These improvements help reduce nuisance alarms and save you time and money. Uses 9V batteryfor Battery Back up.