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 extended usage time. When locked, the device 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 security, and personal item protection. Secure your valuables anytime to safeguard privacy. How to reset the timer lock: 1. Press the center of the LCD screen to remove the protective film. Locate the reset button under the screw on the left side of the screen. 2. Use a metal pin or clip and insert it into the reset hole, then press firmly. 3. When a "Bi" sound is heard (in sound mode), the LCD will display correctly, 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. Measurement error is +/- 1-3cm.