USB lithium battery charging, with screen and 3 small buttons to set hours or minutes, the maximum setting time is 99 hours and 59 minutes.<br> USB charging lasts for 120 hours.<br> When the lock is locked, it will not open and it is impossible to break it by hand. Please set the time reasonably.<br> The padlock combination is and suitable for airport and travel safety. You can lock your important items at any time to protect your privacy.<br> How do I reset the timer lock?<br> If you find you can not operate the timeout or the LCD is not displayed. correctly. Please follow this way to timer:<br> 1:Press the center of the LCD screen to strip the protective film and tear the film off. You will find a stop under a screw on the left side of the screen.<br> 2:Find a metal pin or metal clip and insert it into the hole to and then run it.<br> 3:When you hear a "Bi" sound (in sound mode), the LCD will display correctly. The timeout has been successfully reset.<br> 4:Please glue the protective film back on.<br> weight 30g.<br> colour:black<br> Material:ABS<br> Package Contents:<br> 1 * Time Lock<br> Only the above package content, other products are not included.<br> Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.