1.Need to drill an Extra Hole with a diameter of 0.6''15mmto strengthen this lock before you install it. 2.Please Long Press to lock when you outside the door without phone. 3.If spindle is too long, cut off excess parts according to the thickness of the door. 4.Smart Lever Door Lock stores your fingerprint locally instead of being on the Cloud. Were striving to protect your privacy. 5.Our door is suitable for both left and right doors. Just leave the screw to rotate. Before installing the door, please confirm the direction of your door. 6.With such simple modern design, our Keyless Entry Door Lock is exactly easy to Install compare with other heavy and complicate smart door lock, non-tech-savvy could install it within several minutes Specification: Color:Black Panel Material: Aluminum Alloy Door Thickness:35-55mm Voltage: DC6V Power Supply: 4X1.5v AA Alkaline Batteries (Not included) Dynamic Power Consumption: 150-300mA Static Power Consumption :< 30A Fingerprint Capcity: 100 piece Password Capacity: 300 piece IC Cards Capacity: 1000 piece Size: 140X60X16mm (Front), 155X68X28mm(Back) Specifications: password + key + APP+Fingerprint Application: wooden doors, doors, office doors, apartment doors APP: TTlock Package including: 1X Touch Screen Escutcheon 1X Interior Escutcheon 1X Latch 1X Strike Plate 2 X Cards 15X Screw 3X Backup Key 1X Connecting Solenoid 1X Template Card 1X Door Sensor