Item Type: Intelligent LockFunction: Password, smart card, fingerprint, key and other unlocking methods, especially APP remote unlocking is more convenient, various unlocking methods work with each other without interference.Power Supply: 4 x AAA battery (battery not included), USB interface charging (can be used when the battery is low)Package List2 x Door Locks1 x Lock Core Module1 x Iron Accessories1 x Plastic Accessories4 x Short Screws3 x Long Screws3 x Long Screw Sockets2 x Keys2 x Smart Cards1 x Iron Rod1 x Key Ring1Unlock Method: The smart door lock supports password, smart card, fingerprint, key and APP remote unlocking, convenient and fast, no interference with each other. 2Good Durability: The door lock module is waterproof, tested at high and low temperature, resistant to vibration and aging, can adapt to harsh environments. 3Remote Function: The door lock can be connected to the mobile phone through WiFi to realize remote unlocking, and the unlocking record can be viewed through the APP. 4Multiple Features: Support power on self test, intelligent identification, quick selection, prevent others from peeking at the password, and ensure high security. 5USB Charging: Using the USB interface to charge, when you forget to replace the battery and cannot open the door, the USB emergency power supply can help you.