USB rechargeable lithium battery with three small buttons to set hours or minutes, maximum setting time is 99 hours and 59 minutes. USB charging provides extended usage time. When locked, the padlock remains securely closed and cannot be opened manually. Set the time appropriately for optimal performance. Lightweight padlock design suitable for travel and airport security. Secure personal belongings anytime to 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. 2. Locate the reset hole next to the screw on the left side. Use a metal pin or clip to press the reset button inside the hole. 3. When a "Bi" sound is heard (in sound mode), the LCD will display correctly and the timer is reset. 4. Reapply the protective film after reset. Color: Black Material: ABS Size: 7.3 x 4.7 x 2 cm Package Contents: 1 x Time Lock Note: Light and display differences may cause slight color variation between the image and actual item. Measurement error allowed is +/- 1-3 cm.