Kidde 10-Year Worry Free Smoke & Carbon Monoxide Detector, Lithium Battery Powered with Photoelectric Sensor and Voice Alarm 21030866 - The Home Depot
SafeTAlert SA339 White RV Battery Powered CO2 Detector SA339WHT - Atlantic Rigging Supply
First Alert Battery-operated Carbon Monoxide Detector in the Carbon Monoxide Detectors department at Lowes.com
First Alert 10-Year Battery-Operated Smart Combination Smoke and Carbon Monoxide Detector with Voice Alert in the Combination Smoke & Carbon Monoxide Detectors department at Lowes.com
Safe-T-Alert SA-340 Black RV Battery Powered CO2 Detector - Rectangle 715456340029 | eBay
Kidde Alarm|Combo Hardwired Smoke & CO2 Alarm|Smoke & CO2 Detector | Majestic Lighting