1,TUYA APP Fingerprint, passwords, card and mechanical key are available. "9" and " # " Activate remote unlocking. This door lock uses passive signal transmission technology, you must click “9”and “#” on the door lock to activate the remote control. The technology can save up to 30 percent of energy and improve battery life. Open TUYA APP to unlock remotely When the lock is awakened by "9" and" #", your TUYA APP will display a request to open the door remotely and you have 30 seconds to decide whether to open the door or not. Unlocking record As long as the door is connected to the Internet, you can always use the TUYA app to view the door opening log. 2,Card Unlock RFID chip and RFID card reader have strong resistance to water, oil, chemicals and other substances.RFID technology identification is more accurate and more flexible. Penetrable and unobstructed reading 3,Class "C" core (Judged by key shape) The key shape is double-sided blade inner milling groove, lock core type is side column lock core, regional interopening rate is zero (one in 16 million), the structure is double-row blade plus V-shaped side column lock; 4,Fingerprint Unlock The lock can store 150+ fingerprints.Convenient operation, high recognition rate and fast recognition speedhHigh stability and reliability. 5,Code Unlock The lock can store 200+ codes .The lock can set a variety of different types of password, administrator password, ordinary user password, dynamic password, can be set according to the need of different types of password. Characteristic introduction of door lock Ultra-energy saving The door lock uses passive signal transmission technology, so it is very energy efficient. 4 AA batteries can last about one year.Don't worry if the battery is dead -- there's a spare key, an emergency charging port, and the TUYA APP will remind you several times to replace the battery. Passage Mode & Automatic Mode * # + Admin code + click " 3 1 1 " to set it to passage mode(The same method can be set to automatic mode.).Once Passage Mode is on, you need to press " # " to lock it. Reversible Handle Both the handle and latch are reversible, so they can fit a variety of door types.Lift the handle to lock. Press down to unlock Characteristic introduction of door lock Type "C" lock body (not included) The item does not contain "C" type lock body. Type "A" lock body The item only contains "A" type lock body. Type B lock body (not included) The item does not include Type "B" lock body. If you need Type B lock body, Please let us know by email.