Lock and unlock your home or office without the hassle of keys with this MEC Electronic Deadbolt. Create up to 20 unique PIN codes to share with your family and friends for ultimate convenience. Including a backlit touch screen keypad, users have the option of entering a PIN code to unlock the door and with a smart auto-lock function, the deadbolt will lock automatically after a specified period of time for that added security. Easy to install to most doors, you can effortlessly upgrade your existing deadbolt.4 x AA Batteries1 Master pin code + 20 user codes with 1 touch locking and auto-lock functionPushbutton Keypad lets you unlock by entering your PIN code and lock-up with a simple tap of the keypadMotorised Deadbolt 60mm -70mm adjustable with Keypad back lit and Matte Black finishEasily installation and upgrade of existing deadbolt lock