USB lithium battery charging with a screen and three small buttons to set hours or minutes. Maximum setting time is 99 hours and 57 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 suitable for travel and airport 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 a small hole under the screw on the left side of the screen. 3. Insert a metal pin or clip into the hole until you hear a "beep" sound (in sound mode). The LCD will display correctly, indicating the timer has been reset. 4. Reapply the protective film. Weight: 30g Color: Black Material: ABS Package Contents: 1 x Time Lock Note: Lighting and display settings may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.