SmartCode Electronic UL listed (Underwriters Laboratories) deadbolt featuring SmarkKey. Keyless entry single cylinder deadbolt. 1-touch locking with motorized deadbolt, lighted keypad, automatic deadbolt handing, automatic locking feature after 30 seconds, alternate keyway entry features SmartKey cylinder, a bump-resistant, higher pick-resistant lock eliminating traditional re-keying. Re-keying can be done with just the included learning tool in a matter of seconds.