Best Onelink First Alert

First Alert PRC700VA-6 Slim Series Photoelectric Smoke & Carbon Monoxide Detector with Voice Location

First Alert Battery Operated Wireless Interconnect Smoke and Carbon Monoxide Alarm

Ecoey Smoke Detector, Smoke Alarm with Advanced Photoelectric Technology, Fire Alarm Smoke Detector with Test Button and Low Battery Reminder, Fire Alarm Used in Bedroom, Home, FJ138, 1 Pack

Carbon Monoxide Alarm, Digital Display CO Detector Security CO Monoxide for Home Kitchen Bedroom Safety Battery Powered (Battery not Included),Comply with CSA 6.19 (2 PACK)

Carbon Monoxide Detector Portable CO Alarm [3 in 1] CO & Temperature & Air Humidity Meter with LCD Display and Buit-in 1000mAh Lithium Battery for Home & Outdoor Use UL2034

Keypad Motion Sensor Alarm for Garage, Shed. Loud 130dB Siren. USB Powered Indoor Infrared Home Security System for Door, Window. Cordless Battery Operated Travel PIR Motion Detector Simple Alert

First Alert ZCOMBO 2-in-1 Z-Wave Smoke Detector & Carbon Monoxide Alarm

EZ Tone Entrance Alert