Yale Assure Lever electronic door lock,

REPLACES YOUR EXISTING LEVER OR KNOB on doors with a single hole (no deadbolt) that are 1-3/8" to 1-3/4" thick with just a screwdriver.
USE YOUR UNIQUE ENTRY CODE: Forget fumbling with keys, to unlock just enter your entry code on the backlit keypad.
CONTROL ACCESS TO YOUR HOME: Never hide a key again, create unique entry codes for the people you trust. Delete codes anytime you need to.
ENABLE AUTO-LOCK to ensure your door always locks behind you.
BACKED BY YALE, the world's favorite lock brand since 1840 with a lifetime limited warranty on finish and mechanical hardware.
NEVER GET LOCKED OUT: Don't worry about dead batteries, the lever comes with 2 physical keys and has a 9V back-up charger on the keypad.
REVERSIBLE HANDING, fits left handed or right handed doors.
DON'T WORRY ABOUT MARKING YOUR DOOR: The lock has a rubber gasket to protect your door's finish.
The lock's keypad is backlit so it's easy to see at night and the numbers won't wear off.