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 padlock remains securely closed and cannot be opened manually. Set the timer appropriately for your needs. The combination padlock is lightweight and ideal for travel, airport use, and personal security. Secure your valuables anytime to protect your 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. Use a metal pin or clip to insert into the hole and press the reset button inside. 3. When you hear a "beep" sound (in sound mode), the LCD will display properly, indicating the timer has been reset. 4. 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 variations in color compared to the actual item. Measurement error is +/- 1-3cm.