BRK-First Alert Carbon Monoxide Alarm, 5.4" x 1.9", 120Volt AC, 60Hz, 9 Volt Battery Back-Up

Carbon Monoxide Alarm, 5.4 Inch x 1.9 Inch, 120Volt AC, 60Hz, 9 Volt Battery Back-Up, Amps: 0.9, Temperature Range: 40°F (4°C) to 100°F (38°C), Humidity Range: 10 to 95%, Audio Alarm: 85 Decibel