all locks are preprogrammed. These locks are ABS.Two unlock modes Use card to unlock this is perfect to use User cardManagement card to unlock this is perfect to use in businesses, such as hotels, massages, etc.This electronic cabinet lock set is used for cabinet, drawer, cupboard, storage box etc. for household or business supermarket, sauna club, gym, swimming stadium, library, factory and office.Suitable for wooden cabinets and drawersThe lock fits wire doors that are less than 1 14 inches thick. It is perfect for locking cabinets, drawers, cupboards, lockers, carts, computer racks, etc. RFID does not work through metal doorsIt can provide 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, easily installed with screws.with 2 AA batteries not included the lock opens automatically when the voltage is low.Color grayMaterialABSPackage contents1Lock without batteries1buckle1sensor patch3keychain1sensor card1 packagescrewsOnly the above package contents, 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 is13 cm.