Kidde Smoke & Carbon Monoxide Detector with Voice Alerts, Battery Powered, Combination Smoke & CO Alarm

2 units in 1: unit alerts you to smoke & carbon monoxide by sounding a loud, 85-decibel alarm & sounding voice alerts Ionization sensor technology

Equipped with internal, self-testing components that are always checking to ensure the device is operating as expected, while ionization sensors provide smoke and fire detection, giving you peace of mind.

Kidde Battery Operated Wireless Combination Carbon Monoxide & Smoke Detector with Voice Alert

Kidde Code One Hardwired Interconnectable Smoke & Carbon Monoxide Detector with AA Battery Backup 21032251 - The Home Depot

PI9010 Dual Sensor Battery Operated Smoke Alarm

Kidde Combination Smoke and Carbon Monoxide Detector with Voice Alert at