Keyless entry door lock, second generation rotary handle Double-sided password. Stylish, compact design - Keyless, Smart, High Security, Artistic.Durable zinc alloy plates and handle; Stainless steel internal fittings. Easy to operate, needs no key or card, no power, no battery. Pure mechanical digital button operation. Install on right or left edge of the door. Suitable for offices, classrooms, apartments, etc. Suitable for door between 30mm and 60mm thick. Suitable for a variety of door installations, such as wrought iron doors, wooden doors, steel doors, patio doors. Simple installation, quick operation, outdoor use, waterproof, rainproof, sunscreen, fireproof, no rust, environmental protection. Detailed installation guide & operation. Keystroke function: 12 buttons, including 10 number keystroke and 4 letter keystroke. Special key-button "C", eliminate misinput, easily use. Numeral key-choose 4-7buttons to set the password in 13 keystroke except button "C".