NFC SETTING: For Android, copy your RFID key to your smartphone's wallet via NFC. For IOS, add a new transit card to Apple Wallet and program the transit card to your lock as an NFC access card. CONCEALED LOCK, INVISIBLE STYLE: Avoid damaging your door's appearance. Easy DIY installation, no drilling required, just install with screws. Features automatic rebound and automatic locking. The lock is suitable for doors less than 1.2 inches thick, ideal for gun cabinets, medical carts, data racks, and safes, etc. Not suitable for metal doors. LOW POWER ALARM and AUTO-UNLOCK: Motor lifespan is approximately 100,000 uses, static power consumption is less than 5A. Powered by 4 AA alkaline batteries, which can be used for more than 12 months. Low battery status indicated by a long beep after opening. After the long beep, the lock can be used approximately 15 more times. When the battery is too low, the lock will open automatically, at which point the battery must be replaced before it can be used again. EASY OPERATION: Master card or keyring has been set for the lock, no programming or activation needed. All you need to do is install 4 AA alkaline batteries, then you can use the lock. You can program the keys into the locks before installation so you can use one FOB (RFID card or tag) to open multiple locks. WIDE RANGE OF APPLICATIONS: This intelligent cabinet lock has a stainless steel latch and an ABS plastic lock body, which is durable and corrosion-resistant for long-term use. This cabinet lock is only suitable for wooden doors and is widely used for drawers, cabinets, wardrobes, and sliding doors. The independent reset system can recognize all cards (no more worries about losing a card). Secure your belongings with this easy-to-install and reliable hidden lock!