The Kidde P3010B comes with a sealed lithium battery and a Smart Hush™ feature. Unit chirps when battery needs replacing.
Power Source: Sealed Lithium Battery
Audio Alarm: 85 dB at 10 ft
Size: 5 1/4″x 1 5/8″
Weight: 1 lb
Warranty: 10-year limited
Note: Cannot ship to AK, HI, PR, or Catalina.