USB lithium battery charging with a digital display and three small buttons to set hours or minutes. Maximum setting time is 99 hours and 59 minutes. Fully charged battery lasts up to 120 hours. When locked, the padlock remains securely closed and cannot be opened manually. Set the timer appropriately for your needs. The combination padlock is lightweight and suitable for travel, including airport use, providing security for personal items and privacy protection. 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 until a "beep" sound is heard (in sound mode). The LCD will then display correctly, indicating the reset is complete. 4. Reapply the protective film after resetting. Weight: 30g Color: Black Material: ABS Package Contents: 1 x Time Lock Note: Light and screen display differences may cause slight variations in color compared to the actual item. Measurement error is +/- 1-3cm.