Kidde Firex Hardwired Smoke Detector with Photoelectric Sensor and 9-Volt Battery Backup 21029883 - The Home Depot
First Alert PR710 10-Year Sealed Battery Photoelectric Smoke Alarm
First Alert 1039772/PR700 Slim Battery Operated Photoelectric Smoke Alarm: Fire & Smoke Alarms & Accessories (029054018595-1)
BRK Electronics SC7010B Hard Wired T3 Smoke/T4 Carbon Monoxide Photoelectric Alarm with Strobe - Vaughn Engineering
SITERLINK Smoke Detectors Battery Operated, Smoke Alarm with Test-Silence Button, Photoelectric Sensor Fire Alarms Smoke Detectors with LED Lights, UL Listed Fire Alarm for House, GS528A, 4 Packs - Amazon.com