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. Lightweight combination lock design suitable for travel and airport security. Secure your personal items anytime to protect 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 to press the reset hole. 3. When a "beep" 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: Lighting and monitor differences may cause slight color variations between the image and actual item. Measurement error allowance is +/- 1-3 cm.