Eliminate the need for keys; enter your house with your own personal code. No more lockouts or hiding keys under the mat. Store up to 6 unique user codes for family, guests, neighbors, dog walker etc. Installs in minutes with just a screwdriver. Fits most standard doors and operates on 4 AA batteries. It features SmartKey re-key technology as the back-up keyway. Deadbolt operated by electronic keypad or key from outside and thumb turn inside. Master code feature for increased security. Backlit exterior keypad for increased visibility at night. Single cylinder deadbolt. Lifetime mechanical and finish warranty; 1 year electronics warranty. Strike plate: 2.75" H x 1.25" W. Overall dimension: 2.87" W x 7.44" H x 1.9375 D.