BRK-first alert ,electrical parts

BRK-First Alert 1038870 Combination Alarm and LED Strobe

Combination Alarm and LED Strobe, 120VAC, 60Hz Wire-In, AC Powered with 10 Year Sealed Battery Backup, Separate Flash Patterns to Distinguish Between Smoke and Carbon Monoxide.BRK-First Alert 3120B Smoke Detector, Photo & Ion, 120VAC

Smoke Detector, Photoelectric and Ionization Sensor, 120 Volts AC, Wire-In, Size: 5 inch Diameter, 2 inch Depth, Color: White, Includes: (2) AA Battery Back-Up