Product USB lithium battery charging with 3 small buttons to set hours or minutes; maximum setting time is 99 hours and 59 minutes. USB charging lasts up to 120 hours. When the lock is engaged, it will not open manually. Set the time reasonably. The padlock is lightweight and suitable for airport and travel security. Secure your important items anytime to protect your privacy. How to reset the timer lock: If you cannot operate the timeout function or the LCD is not displaying correctly, follow these steps: 1. Press the center of the LCD to remove the protective film. Look for a small hole under a screw on the left side. 2. Use a metal pin or clip and insert it into the hole to trigger the reset. 3. When you hear a "Beep" sound (in sound mode), the LCD will display properly. The timer has been successfully reset. 4. Reapply the protective film. Weight: 57g Color: White Material: ABS Package Contents: 1 x Time Lock Only the above package content is included; other items are not included. Note: Lighting effects and monitor settings may cause slight color differences between the image and the actual item. Measurement error is +/- 1-3 cm.