Product USB lithium battery charging with SN and 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 locked, the device cannot be opened manually and is designed to resist forced entry. Please set the time appropriately. The padlock is suitable for travel and airport security. It allows you to secure important items and protect personal privacy. How to reset the timer lock: If the timer does not operate properly or the LCD does not display correctly, follow these steps: 1. Press the center of the LCD SN to remove the protective film. Locate the reset hole under the screw on the left side of the SN. 2. Use a metal pin or clip and insert it into the reset hole. 3. When a "beep" sound is heard (in sound mode), the LCD will display correctly. The timer has been successfully reset. 4. Reapply the protective film after resetting. 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 and display differences may cause slight color variations between the image and the actual item. Measurement error allowed is +/- 1-3 cm.