Please read below before buying... Zinc Alloy, Stainless Steel 3-in-1 Three ways to unlock: User codes(up to 50), RFID cards(5 pack included) and the keys, Random password, user code is between 1-12 digits Fit doors: Single latch door, adjustable backset 2-3/8" or 2-3/4", door thickness between 30mm and 90mm Reversible lever: fits both left-handed and right-handed doors.Freely change handle direction(Free handle). DIY installation. NOT WATERPROOF, only for home and office Interior doors Stainless steel transmission structure with Stylish and elegant appearance.Adopt patented sealed capsule driving unit instead of motor, more stable and durable. Easy to installation and change batteries easily. 4.8V low voltage alarm. Capacitive touch, Mechanical key for emergency using. Description: - Stainless steel transmission structure with Stylish and elegant appearance. - Adopt patented sealed capsule driving unit instead of motor, more stable and durable. - Keyless, touch keyboard door, recognition rate of 99.999% - Freely change handle direction(Free handle). - Easy to installation and change batteries easily. - User deleted individually, more convenient and safe. - Keypad Shutdown: 10s if a code is wrongly input 3 times. - Suitable for villas and apartment doors, security doors and wooden doors. Specification: - Material: Zinc Alloy, Stainless Steel - Standard Mortise: Single Latch - Standard Backset: 2 3/8" - Ways to Unlock: Card, Code or Override Key - Rejection rate :≤ 0.01% - Recognition false rate :≤ 0.0001% - Verify match time :