The Level Touch Edition Model B2 C-L12U Invisible Smart Door Lock in Satin Nickel is a high-tech and stylish addition to any home. This deadbolt features Bluetooth connectivity for easy control and electronic operation. With a sleek satin finish and compact dimensions of 2.75 inches in height and 4.5 inches in width, this lock is suitable for use on patio doors, residential interior doors, and even front doors. The package includes a CR2 battery, screws, hardware, instructions, and a key for convenience. Easy to install and secure, this smart door lock offers both modern functionality and peace of mind.