USB lithium battery charging with a screen and three small buttons to set hours or minutes. Maximum setting time is 99 hours and 57 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 is lightweight and suitable for travel and airport security. Secure your personal items anytime to protect your privacy. How to reset the timer lock: 1. Press the center of the LCD screen to remove the protective film. 2. Locate a small hole under the screw on the left side of the screen. 3. Insert a metal pin or clip into the hole to reset the device. 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: Light and display differences may cause slight color variation between the image and the actual item. Measurement error is +/- 1-3 cm.