USB rechargeable lithium battery with a digital display and three small buttons to set the timer in hours or minutes, with a maximum setting of 99 hours and 59 minutes. The USB charging provides long-lasting power. When the lock is engaged, it remains securely closed and cannot be opened manually. Set the timer appropriately for your needs. This lightweight combination padlock is suitable for travel and airport security, allowing you to secure personal items and protect privacy. How to reset the timer lock: 1. Press the center of the LCD screen to remove the protective film. 2. Locate the reset hole under the screw on the left side of the screen. 3. Insert a metal pin or clip into the hole to initiate reset. 4. When a "beep" sound is heard (in sound mode), the LCD will display properly, indicating the reset is complete. 5. Reapply the protective film after resetting. Weight: 30g Color: Black Material: ABS Package Contents: 1 x Time Lock Note: The actual color may vary slightly due to lighting and screen settings. Measurement error is +/- 1-3cm.