First Alert Smoke Alarm SA350B Lithium Battery Ionization Smoke Alarm 10-Year Sealed Tamper-Proof Battery [ 2 PACK ]- 0827-SA340CN SA340CN

Smoke detector with built-in 10-year 3-volt lithium power cell Ionization sensor for efficient smoke detection Tamperproof design prevents batteries from being removedYou may also like First Alert Hardwired Smoke Alarm with Battery Backup 12 PACK.