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 usage. When locked, the padlock remains securely closed and cannot be opened manually. Please set the timer appropriately. The padlock is lightweight and suitable for travel and airport use, allowing you to secure personal items and protect 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 point under the screw on the left side. 2. Use a metal pin to insert into the hole and trigger the reset function. 3. When a "Bi" sound is heard (in sound mode), the LCD will display correctly, indicating the timer has been reset. 4. Reapply the protective film after reset. Color: Black Material: ABS Size: 73 x 47 x 2 cm Package Contents: 1 x Time Lock Note: Light and display differences may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.