Features: -4 AA alkaline batteries (included). -Access from anywhere when you have an apple tv (4th gen or later) near your front door. -Installs within minutes on standard doors, 1-3/4 inch to 2-1/4 inch thick with just a screwdriver. -Key free = no lost keys, no locksmiths and no pick and bump break-ins. Never get locked out, the lock can be energized with a 9V battery.. -Lock and unlock your door by asking Siri or with the apple home app, when you're at home. -Touchscreen. Deadbolt Type: -Single cylinder. Door Type: -Exterior. Dimensions: Overall Height - Top to Bottom: -9.2 inch. Overall Width - Side to Side: -5.5 inch. Overall Depth - Front to Back: -5.5 inch. Overall Product Weight: -5 lbs.