First Alert Battery Powered Z-Wave Smoke Detector & Carbon Monoxide Alarm, Works with Ring Alarm Base Station, 2nd Generation First Alert Powered Alarm SCO5CN Combination Smoke and Carbon Monoxide Detector, Battery Operated, 1 Pack, White First Alert 0827B Ionization Smoke Alarm with 10-Year Sealed Tamper-Proof Battery , White , Pack of 1 First Alert 9120B Smoke Detector, Hardwired Alarm with Battery Backup, 6-Pack FIRST ALERT BRK SC9120FF Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup, 1 pack , White First Alert CO605 Plug-In Carbon Monoxide Detector with Battery Backup , White First Alert HOME1 Rechargeable Standard Home Fire Extinguisher UL Rated 1-A:10-B:C, Red First Alert CO710 Carbon Monoxide Detector with 10-Year Battery and Digital Temperature Display , White