Protect File Privacy: Invisible hidden lock, installed inside the cabinet and unlocked directly by Bluetooth APP. It is used for office drawer cabinets to protect important documents and personal belongings; when documents are misplaced or the key is lost, the lock can be unlocked remotely via mobile phone, which is safe and convenient. APP Remote Authorization Key: If you are not at the company on a business trip or vacation, and colleagues urgently need documents in the drawer, you can remotely authorize the key via the APP, set the authorization period, you can also check the unlocking record and revoke the right to use the key at any time. View Unlocking Records in Real Time: View all unlocking records on your mobile phone in real time and track the usage of smart cabinet lock switches. In addition to authorization operations via the app, batch authorization in the background or removing other people, generating QR code scanning code authorization, querying detailed unlocking records, etc. Auto-Lock: Set the auto-lock function on the app, and the lock will automatically deploy after unlocking; when the auto-lock function is disabled, the bolt will not automatically extend after unlocking. If you need to use the drawer frequently for a period of time, you can turn off the auto-lock function for easier document retrieval and access. Powered by: 2 AAA batteries (not included) for power supply, ultra-low power consumption design, and automatic reminder function when the battery is low. Open the lock, the remaining battery status is displayed. Can be configured to automatically open when the battery is low to avoid important files being inaccessible.