smoke detector and carbon dioxide detector

First Alert SM100V-AC, Interconnect Hardwire Smoke Alarm with Battery Backup & Voice Alerts, 1-Pack

First Alert CO710 Carbon Monoxide Detector with Digital Temperature Display: 10-Year Warranty, Lithium Battery, White

First Alert CO400 Battery Powered Carbon Monoxide Detector: 9-Volt CO Alarm, Silences Unwanted Alarms, 7-Year Warranty

First Alert® SMI100 Battery-Operated Smoke Alarm

First Alert Precision Detection Interconnect Hardwired Smoke Alarm with 10-Year Battery Backup

First Alert Smoke Alarm, Interconnect Hardwire Detector with Battery Backup, SMI100-AC, 3-Pack

First Alert Alarm Smoke DC10 SM210 Clam Tray: 10-Year Lithium Ion Battery, Fire Alarm, No Hardwired Installation Required

First Alert 9120B Smoke Detector, Hardwired Alarm with Battery Backup, 3-Pack

First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup

First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 3-Pack

BRK Voice and Locatio Hard-Wired w/Battery Back-up Photoelectric Smoke Detector 1 pk

First Alert® SMI110 Sealed 10-Year-Battery Smoke Alarm

BRK Hard-Wired w/Battery Back-up Electrochemical Carbon Monoxide Detector

Airthings Wave Enhance Indoor Air Quality Monitor

Airthings View Radon and Indoor Air Quality Monitor

First Alert® GC01CN Combo Explosive Gas and Carbon Monoxide Alarm with Digital Display

Stalwart Rechargeable Natural Gas Detector Sniffer

First Alert® CO3-B01D-T Battery-Operated Carbon Monoxide Alarm with Digital Display

First Alert® Battery-Powered Carbon Monoxide Alarm with Backlit Digital Display

Leak Puppy Electronic Water Alarm- Detects as Little as 1/32" of Water- Leak Detector Beeps When Battery is Low