USB lithium battery charging with three 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 manually forced open. Please set the timer appropriately. The combination padlock is lightweight and suitable for travel and airport security use. Secure your valuables anytime to protect your privacy. Model Number: Smart Time Lock Weight: 60g Feature 1: LCD Time Lock Feature 2: USB Rechargeable Temporary Timer Padlock If you experience issues with the timer function or LCD display, follow these steps: 1. Press the center of the LCD screen to remove the protective film. Locate the reset point under the screw on the left side. 2. Use a metal pin or clip and insert it fully into the hole. 3. When you hear a "Beep" sound (in sound mode), the LCD will display correctly. The timer has been successfully reset. 4. Reapply the protective film after resetting. Color: Black Material: ABS Size: 7.3 x 4.7 x 2 cm Package Contents: 2 x Time Lock Note: Light and display differences may cause slight color variations between the image and the actual item. Measurement error allowance is +/- 1-3 cm.