Home Amazon Goldbox Save on First Alert BRK 3120B Hardwire Dual Photoelectric and Ionization Sensor... Amazon Goldbox Save on First Alert BRK 3120B Hardwire Dual Photoelectric and Ionization Sensor Smoke Alarm with Battery Backup and more By ARCOM - 8 January 2018 124 0 SHARE Facebook Twitter Go to the deal page: Save on First Alert BRK 3120B Hardwire Dual Photoelectric and Ionization Sensor Smoke Alarm with Battery Backup and more Save on First Alert BRK 3120B Hardwire Dual Photoelectric and Ionization Sensor Smoke Alarm with Battery Backup and more Expires Jan 22, 2018