USB rechargeable lithium battery with a digital display and three small buttons to set the timer in hours or minutes, with a maximum setting of 99 hours and 59 minutes. The battery lasts up to 120 hours on a full charge. When locked, the padlock remains securely closed and cannot be opened manually. Set the timer appropriately for optimal use. This lightweight combination lock is designed for travel and airport security, allowing you to secure personal belongings and protect your privacy at any time. 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 press the reset button inside the hole. 3. When you hear a "beep" sound (in sound mode), the LCD will display correctly, indicating the timer has been reset. 4. Reapply the protective film over the screen. Weight: 30g Color: Black Material: ABS Package Contents: 1 x Time Lock Note: Light and display differences may cause slight variations in color compared to the actual item. Measurement error is +/- 1-3cm.