All locks are pre-programmed. These locks are made of durable ABS. Two unlocking modes: Use card to unlock (ideal for personal use) User card and Management card to unlock (perfect for business use, such as hotels, massage parlors, etc.). This electronic cabinet lock kit is designed for cabinets, drawers, lockers, storage boxes, etc., for home or business use: supermarkets, sauna clubs, gyms, swimming pools, libraries, factories, and offices. Suitable for wooden cabinets and drawers - The lock fits wooden doors less than 3.175 cm thick. It's perfect for securing cabinets, drawers, lockers, cupboards, trolleys, computer racks, etc. RFID does not work through metal doors! Provides excellent protection for your personal belongings while safeguarding your privacy. It can also enhance child safety, preventing children from freely opening drawers or cabinet doors. Small, compact design. DIY installation: No drilling required, easily installed with screws. Operated by 2x AA batteries (not included) (the lock automatically opens when the voltage is low). Color: Gray Material: ABS Package Contents: 1 x Lock (batteries not included) 1 x Lock Catch 1 x Sensor Plate 3 x Keychains 1 x Sensor Card 1 Pack x Screws Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowable measurement error is 1-3 cm.