USB lithium battery charging with screen and three small buttons to set hours or minutes; maximum setting time is 99 hours and 59 minutes. 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. The padlock design supports travel safety applications and can be used to secure personal items, helping 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. Use a metal pin or clip to insert into the hole until a "beep" sound is heard (in sound mode). 4. 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: Light and display differences may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3cm.