4-in-1 Keyless Smart LockAPP(Tuya Bluetooth)+Fingerprint Recognition+Password + Mechanical key.Support garbled unlocking to prevent voyeurism. Support APP remote control, shared temporary password and dynamic password.Suitable for door thickness 38-68mm, no need to worry about not being installed.Fingerprint LockBuilt-in up-to-date fingerprint identification module.Smart fingerprint door locks recognize fingerprints within 0.5S and can store up to 200 fingerprints.The lower the error recognition rate, with self-learning function, the faster the use, the faster the recognition speed. (Only live fingerprints are identified and fake fingerprint membranes are rejected)Anti-peepingVirtual password entry with anti-monitoring function. You can enter a string of numbers before or after the correct password to confuse bystanders. For example, if the correct door opening password is 123456, enter 00000123456 x 0000 to open the door.Low-charge alarmWith low power consumption function, you can use at least 4 AA batteries (not included). When the voltage is lower than 4.8V, the low voltage prompt will remind you to replace the battery. When you forget to replace the battery and cannot open the door, the USB emergency power supply can help you.24-hour ServiceIf the product encountered any problems, please feel free to contact our customer service, customer service 24 hours online for you to answer. Smart Tuya Smart Lock Fingerprint Door Lock 4-in-1 Unlock Touch Screen Bluetooth APP Keyless Entry Door Lock for Home Office Hotel Apartment Compatible with Alexa