First Alert BRK SC7010B Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup , White - Combination Smoke Carbon Monoxide Detectors - Amazon.com
First Alert 0827B Ionization Smoke Alarm with 10-Year Sealed Tamper-Proof Battery , White - Amazon.com
First Alert 10-Year Battery-Operated Combination Smoke and Carbon Monoxide Detector in the Combination Smoke & Carbon Monoxide Detectors department at Lowes.com
First Alert 2pk Sa300cn2 Battery Powered Smoke Detector : Target
First Alert SA521CN-3ST Wireless Interconnect Hardwired Smoke Alarm