USB lithium battery charging, with sn 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. The lock will not open after being locked, and it is impossible to break it by hand. Please set the time reasonably. The padlock combination is suitable for airport and travel security. You can lock important items at any time to protect your privacy. Model: Smart Time Lock Weight 30g Function 1: LCD Time Lock Function 2: USB Rechargeable Temporary Timer Padlock If you find that you cannot operate the timeout or the LCD does not display correctly. Please follow the following method to time it: 1: Press the center of the LCD sn to peel off the protective film and tear off the film. You will find a stopper under the screw on the left side of the sn. 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: Please re-stick the protective film. Color: Black Material: ABS Size: 7.3 x 4.7 x 2Cm Package Contents: 1 x Time Lock Package Contents above only, other products not included. Note: Light and different monitors may cause the color of the item in the picture to be slightly different from the actual item. The measurement allowable error is +/- 1-3cm.