Home Home & Garden Amazon Deal of the Day: First Alert Hardwired Smoke Detector Alarm w/... Home & Garden Amazon Deal of the Day: First Alert Hardwired Smoke Detector Alarm w/ Backup Battery (6PK) $38.92 By ARCOM - 9 February 2020 101 0 SHARE Facebook Twitter Go to the deal page: Amazon Deal of the Day: First Alert Hardwired Smoke Detector Alarm w/ Backup Battery (6PK) $38.92