All locks are pre-programmed. These locks are made of ABS material. Two unlock modes: Use a card to unlock (ideal for personal use); use a user card plus a management card to unlock (ideal for business environments such as hotels, massage parlors, etc.). This electronic cabinet lock kit is suitable for cabinets, drawers, lockers, storage boxes, and similar applications in both household and commercial settings, including supermarkets, sauna clubs, gyms, swimming pools, libraries, factories, and offices. Compatible with wooden cabinets and drawers the lock fits wooden doors up to 1.25 inches thick. Perfect for securing cabinets, drawers, lockers, cupboards, carts, data racks, and more. RFID technology does not work through metal doors. Provides reliable security for personal items and enhances privacy protection. Also improves child safety by preventing children from freely opening drawers or cabinet doors. Compact, space-saving design. DIY installation with screws no drilling required. Operates on 2 x AA batteries (not included). The lock will automatically unlock when battery voltage is low. Color: Grey Material: ABS Package Contents: 1 x Lock (batteries not included) 1 x Lock buckle 1 x Sensor patch 3 x Key chains 1 x Sensor card 1 pack x Screws Note: The package includes only the items listed above. Other products are not included. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement error allowance is +/- 1-3 cm.