The Kidde dual sensor smoke alarm features a blinking LED light to show it is functioning properly. It also has a low-battery warning.
With both the photoelectric and ionization technologies in use, as well as its interconnectable capabilities, most fires will be noticed before real damage can be done.
Power Source: 120 VAC w/ 9V battery backup (battery included)
Audio Alarm: 85 dB at 10 ft
Size: 5 3/4″x 1 13/16″
Weight: 1 lb
Interconnect: Up to 24 Kidde devices (18 initiating)
Warranty: 10-year limited