Satin Nickel Bluetooth Enabled Fingerprint and Touchscreen Smart Door Lock Finish:Satin Nickel A: Passage sets are designed Color Finish:Bianco Starlite A: Passage sets are designed for interior hall and closet doors where locking is not needed Crafted of the finest solid brass materials 6 in diameter ring is the perfect size Concealed screw mounting hardware installs easily Wall mounted design is an ideal use of space Designer finish will provide corrosion free performance Products are provided with a limited lifetime warranty You can also view logs of who's entered from Ultraloq smartphone app ) 4 Battery Type Required AA Included Batteries Included