Deadbolt with light-up keypad provides convenient keyless access with backup key access. Easy-to-install deadbolt is easily programmed and stores up to 20 different user codes. NightWatch feature prevents an intruder from entering, even if they havea copy of the key. BumpStop advanced cylinder technology resists bump attacks. Deadbolt fits all doors and replaces all brands. Latch is adjustable and fits 2-3/8" and 2-3/4" backsets. Design also includes a single cylinder with thumb turn on inside, full 1" solid-core throw bolt for strength, and a satin nickel finish. Deadbolt runs on four AAA batteries (included) and meets ANSI grade 2 standards.