One key to home convenience is…eliminating the need for unnecessary keys! With an Electronic Keypad Deadbolt from Design House you can eliminate your need for a house key while at the same time upgrading the décor of your home. This Electronic Deadbolt has a 12-button keypad and is powered by 4 AA batteries sold separately). The keypad is backlit for added convenience at night so that punching in an entry password is just as easy as it would be during the day. The Keypad Deadbolt can hold as many as 300 entry passwords with 1 of them serving as the Master Code. The Master Code has override functions to add/remove passwords as well as activating various modes of the lock such as disabling use for all codes except the Master Code. Access passwords consist of 6-digit codes that, when input and accepted, will illuminate a green LED indicator light and unlock the deadbolt for entrance. In the event the Electronic Deadbolt’s batteries die, the door lock can still be opened and closed through the use of an included emergency override key. The Electronic Keypad Deadbolt has an adjustable backset of 2-3/8″ or 2-3/4″ and is designed for door thicknesses of 1-3/8″ to 1-3/4″. This door lock has a Grade 2 Security rating meaning it is designed and built to provide excellent durability and security for residential applications as well as light commercial applications.