One Card for Multiple Locks: Easily program one key for multiple locks and reset, add, or remove key cards freely. The lock uses a 13.56 MHz M1 card, which is more sensitive and secure than standard 125 kHz ID cards. RFID 1.5-inch Detection Thickness: RFID cards can penetrate thicker wooden boards (up to 38mm). It's perfect for cabinets, lockers, drawers, medical carts, data storage, storage boxes, gun safes, pool lockers, libraries, factories, and offices. Robust Mechanism and DIY Installation: Bolts and bolt holes are made of metal, ensuring solid locking. Installation is simple with screws, no drilling required. For surfaces other than wood, 3M tape is recommended for installation. Automatic Unlock on Low Battery: Allows unlocking during low battery periods, so you won't get locked out. When the low battery condition is triggered, it emits a long beep, and the lock can be used approximately 15 times before needing a recharge. Hidden Lock Design: The lock is installed inside the cabinet, allowing doors to be unlocked without touching them. Keep your personal belongings secure and enhance child safety at home.