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. The padlock automatically locks and cannot be opened manually once engaged; set the timer appropriately for secure locking. Lightweight design made from ABS material, suitable for travel and airport security use. Ideal for securing personal belongings and protecting privacy. 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 until a "beep" sound is heard (in sound mode) and the LCD displays correctly. This indicates the reset is complete. 4. Reapply the protective film after resetting. Weight: 30g Color: Black Material: ABS Package Contents: 1 x Time Lock Note: Light and screen differences may cause slight variations in color. Measurement error is +/- 1-3cm.