USB rechargeable lithium battery with a digital display and three control buttons to set time in hours or minutes, with a maximum setting of 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 timer appropriately for optimal use. This lightweight combination timer lock is suitable for travel and airport security, allowing you to secure personal items and protect privacy. How to reset the timer lock: 1. Press the center of the LCD screen to remove the protective film. 2. Locate the reset hole under the screw on the left side of the screen. 3. Insert a metal pin or clip into the hole to trigger the reset. 4. When a "Bi" sound is heard (in sound mode), the LCD will display correctly, indicating the reset is complete. 5. Reapply the protective film after resetting. Weight: 30g Color: Black Material: ABS Package Contents: 1 x Time Lock Note: Light and display differences may cause slight color variation between the image and the actual item. Measurement error is +/- 1-3cm.