USB lithium battery charging, with screen and 3 small buttons to set hours or minutes, the maximum setting time is 99 hours 59 minutes. USB charging can last for 120 hours. When the lock is locked, it will not open, and it cannot be opened manually.Reasonable time setting. The padlock combination is lightweight and suitable for airport and travel security. You can lock important items at any time to protect your privacy. How to reset the timer lock? If you find that you can't operate the timeout or the LCD does not display correctly.Timing like this:1: Press the center of the LCD screen to peel off the protective film and tear off the film. You will find a stop point under the screw on the left side of the screen.2: Find a metal pin or metal clip and insert it into the hole, then run it.3: When you hear a "Bi" sound (in sound mode), the LCD will display correctly. The timeout has been successfully reset.4: Re-stick the protective film.Weight 30g.Color: BlackMaterial: ABSPackage Contents: 1 * Time lock only the above package content, not including other products.Note: Light and different monitors may cause the color of the item slightly different from the actual object. The measurement allowable error is +/- 1-3cm.