USB rechargeable lithium battery with three small buttons to set hours or minutes, maximum setting time is 99 hours and 59 minutes. USB charging provides extended usage time. When locked, the padlock remains securely closed and cannot be manually forced open. Set the timer appropriately for your needs. Lightweight combination padlock designed for travel safety, suitable for airport and personal use. Secure important items anytime to protect privacy. Model Number: Smart Time Lock Weight: 60g Feature 1: LCD Time Lock Feature 2: USB Rechargeable Temporary Timer Padlock If the timer does not operate correctly or the LCD does not display properly, follow these steps: 1. Press the center of the LCD to remove the protective film. Locate the reset point under the screw on the left side. 2. Use a metal pin or clip and insert it fully into the hole. 3. When a "Bi" sound is heard (in sound mode), the LCD will display correctly. The timer has been reset successfully. 4. Reapply the protective film after resetting. Color: Black Material: ABS Size: 7.3 x 4.7 x 2 cm Package Contents: 2 x Time Lock Note: Light and screen display differences may cause slight variations in color compared to the actual item. Measurement error allowance is +/- 1-3 cm.