Electronic locker lock set: very suitable for wardrobe, safes, gun chests, medical carts, data racks, lockers, desks, etc. Please read the instructions and program the lock first, please test before installation! Three Unlocking Modes: Mode One: [RFID Card] You can use one key to unlock multiple locks, Mode Two: You can unlock one lock with a key, Mode Three: Ring unlock with guest card + service card (swipe the hard disk in a row) Only two types of cards can be unlocked when used at the same time. Concealed Cabinet Lock: No need to drill, with screws, equipped with double-sided tape, can be fixed and easy to install. Perfect for wood cabinets. Not suitable for metal doors! ! Strong Penetration: The RFID tag can penetrate thicker wood (up to 0.2") thick wood cabinet doors should not exceed (1.2").