High quality material, durable and reliable Alloy material: sturdy and durable, anti-corrosion, anti-rust, long-term use as new. USB charging: built-in rechargeable battery, support USB port charging, say goodbye to the trouble of frequent battery replacement. Humanised design, experience upgrade Digital input panel: simple and generous, intuitive operation, the elderly and children can easily use. Unlocking record query: APP automatically records each unlocking time, mode and personnel, safe and traceable. Usage Scenario Family use: no longer need to worry about forgetting keys, family members can unlock the door at any time through fingerprints, passwords or APP. B&B/short-term rental: landlords can set dynamic passwords for tenants, and the passwords will be invalidated automatically at the end of the rental period, so the management is more worry-free. Office: Employees can unlock the door via fingerprint or APP, no need to carry keys, improve office efficiency. Caravan/Warehouse: Centralise all keys and manage them remotely via APP, convenient and safe. Notes on use and maintenance Correct use Before first use, please follow the instructions to download the APP and complete the device binding. Regularly check the battery level and charge it in time when it is low to avoid affecting the use. Maintenance and Cleaning The surface of the lock box can be gently wiped with a damp cloth, avoid the use of corrosive cleaners. When not in use for a long time, please switch off the power of the lock box and store it in a cool and dry place.