An useful addition to your home security set up is the Pin Pad, which can be placed at the entry points of your home and used to arm and disarm the system by entering your secret security codes.
This wireless Pin pad is
|Dimensions||2.28×1.97×0.40 inches (5.8×5.0×1.0 cm)|
|Nominal Battery Life||4 to 6 years|
|Operating Temperature||32 to 120 °F (0 to 49 °C)|
|Replacement Battery||One CR123A|
|Weight||0.70 ounces (20 grams)|