USB rechargeable lithium battery with a digital display and three control buttons to set the timer in hours or minutes, with a maximum setting of 99 hours and 59 minutes. The battery lasts up to 120 hours on a full charge. When locked, the padlock remains securely closed and cannot be opened manually. Set the timer appropriately for optimal use. This lightweight combination lock is suitable for travel and airport security, allowing you to secure personal belongings 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 correctly, 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 tolerance is +/- 1-3 cm.