Samsung's keyless deadbolt digital lock offers security and convenience in a stylish housing and design. Installation from an existing deadbolt is a simple retrofit operation. A new install can be completed on a 35~55mm thick door with a minimum of a 90mm lock stile. If you or a loved one has ever been locked out of the house, going keyless is a simple decision. No more keys to hide, or get cut and copied. Giving access to tradies, guests, or friends has never been easier. Its 70 user capacity allows you to register multiple users each with their own code or Samsung KeyTag or SmartTag. Automatic locking allows you to feel secure whenever you leave the house by locking behind you whenever you go out. This can also be set to manual if you're in and out of the house frequently. Our products come complete in the box with all of the parts you'll need including 4 AA batteries and 4 Samsung KeyTags to register.