Powerbolt innovated the keyless entry technology over 10 years ago and has stood up to the test of time. Simply enter your personalized access code for convenient keyless entry. Powerbolt is easy to install, program and use. And the motorized driven deadbolt allows for one-touch locking. It operates on 4 AA batteries and features SmartKey re-key technology as the back-up keyway. This single cylinder deadbolt can be locked or unlocked by using the keypad or key from the outside as well as the turn button from the inside. For use on exterior doors where keyed entry and security is needed Featuring SmartKey^® re-key technology; re-key the lock yourself in seconds in 3 easy steps Deadbolt operated by electronic keypad or key from outside and thumb turn inside 1 in. deadbolt throw Requires 4 AA batteries, purchased separately Keypad stays lit for 30 seconds after inactivity