USB lithium battery charging with a digital screen 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 optimal use. Lightweight combination lock design suitable for travel and airport security. Secure personal items to protect privacy. How to reset the timer lock: 1. Press the center of the LCD screen to remove the protective film. Locate the reset button under the screw on the left side of the screen. 2. Use a metal pin or clip to insert into the hole and press the reset button. 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: 30g Color: Black Material: ABS Package Contents: 1 x Time Lock Note: Light and display differences may cause slight variations in color. Measurement error allowed is +/- 1-3cm.