all locks are preprogrammed. These locks are ABS. Two unlocking modes Use card to unlock this is perfect to use User card Management card to unlock this is perfect to use in business, such as hotel, massage etc. This electronic cabinet lock set is used for cabinet, drawer, locker, storage bo etc. for household or business supermarket, sauna club, gym, swimming stadium, library, factory and office. Suitable for wooden cabinets and drawers The lock fits wire doors that are less than 1 14 inches thick. It is perfect for locking cabinets, drawers, cupboards, cabinets, carts, computer racks etc. RFID does not work through metal doors It can provide a good security protection for your personal belongings while protecting your privacy. It can also improve childrens safety, avoid your children or kids from freely opening the drawers or cabinet doors. Small compact design. DIY Installation No drilling, easy to install with screws. with 2 AA batteries not included the lock will open automatically when the voltage is low. Color gray Material ABS Package Contents 1Lock without batteries 1Lock buckle 1Sensor patch 3Key ring 1Sensor card 1 packscrews The above package content only, 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 measurement allowed error is 13 cm.