Schlage FE595VPLY505PLY Plymouth Keypad Knob Door Lock, Bright Brass Flexible locking feature allows you to switch between locked and unlocked Easy to install; one tool installation Comes with 9 volt battery, 6 digit programming code, and two 4 digit user codes pre-set at the factory Keypad illuminates so you can see it at night Codes easily added or deleted right at the keypad using the lock's unique 6 digit programming code