USB lithium battery charging with 3 small buttons to set hours or minutes; maximum setting time is 99 hours and 59 minutes. USB charging provides up to 120 hours of operation. When locked, the padlock remains securely closed and cannot be opened manually. Please set the timer appropriately. This lightweight combination padlock is suitable for travel and airport security. It allows you to secure personal items and protect your privacy. Model Number: Smart Time Lock Weight: 30g Feature 1: LCD Time Lock Feature 2: USB Rechargeable Temporary Timer Padlock If the timer does not operate or the LCD does not display correctly, follow these steps: 1. Press the center of the LCD to remove the protective film. Locate the reset button under the screw on the left side. 2. Use a metal pin to press the reset hole and activate the device. 3. When a "Beep" sound is heard (in sound mode), the LCD will display properly. The timer has been reset successfully. 4. Reapply the protective film after resetting. Color: Black Material: ABS Size: 73 x 47 x 2 cm Package Contents: 1 x Time Lock Note: Light and screen display differences may cause slight color variations between the image and the actual item. Measurement error is +/- 1-3 cm.