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 (suitable for commercial applications such as hotels, massage centers, etc.). This electronic cabinet lock kit is designed for cabinets, drawers, lockers, storage boxes, and similar enclosures, suitable for both household and business environments including supermarkets, sauna clubs, gyms, swimming facilities, libraries, factories, and offices. Compatible with wooden cabinets and drawers – the lock fits wooden doors up to 1.25 inches thick. Ideal for securing cabinets, drawers, lockers, cupboards, carts, data racks, and more. RFID technology does not function through metal doors. Provides reliable security for personal belongings 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 effects and display settings may cause slight variations in the color shown in images compared to the actual product. Measurement may vary by +/- 1-3 cm.