The Kidde RF-SM-DC is a wireless smoke alarm. This makes it easier to form an interconnected alarm system, one alarm goes off…they all go off.
Power Source: (3) AA batteries (included)
Audio Alarm: 85 dB at 10 ft
Size: 5 3/4″x 1 1/4″
Weight: 8 oz
Interconnect: Up to 24 Kidde devices (18 initiating)
Warranty: 10-year limited