Battery Operated (9V Battery Included), Provides continuous protection even during power outages, Test Button to tests smoke alarm’s electronic circuitry, buzzer horn and battery function, Low Battery Indicator – Low battery warning chirp alerts user to change battery, Discreet Design – 5 inch diameter.
SEC - i9040E
Power Source: 9V Battery (included)
Audio Alarm: 85dB at 10ft
Temperature Range: 40˚F to 100˚F (4°C to 38°C)
Humidity Range: up to 85% relative humidity (RH)
Size: 35mm depth x 127mm diameter (With mounting bracket)