USB rechargeable lithium battery with a digital display and three small buttons to set time in hours or minutes, with a maximum setting of 99 hours and 59 minutes. USB charging provides long-lasting power. When locked, the device remains securely closed and cannot be opened manually. Set the timer appropriately for optimal use. The combination padlock is lightweight and ideal 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 initiate reset. 4. When a "beep" 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: Lighting and monitor differences may cause slight variations in color. Measurement may vary by +/- 1-3 cm.