Product Description:      :USB lithium battery charging, with sn and 3 small buttons to set hours or minutes, the maximum setting time is 99 hours and 59 minutes.   :USB charging lasts for 120 hours.   :When the lock is locked, it will not open and it is impossible to break it by hand. Please set the time reasonably.   :The padlock combination is lightweight and suitable for airport and travel safety. You can lock your important items at any time to protect your privacy.   :How do I reset the timer lock?   :If you find you can not operate the timeout or the LCD is not displayed. correctly. Please follow this way to timer:      :1:Press the center of the LCD sn to strip the protective film and tear the film off. You will find a stop under a screw on the left side of the sn.   :2:Find a metal pin or metal clip and insert it into the hole to the end and 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 glue the protective film back on.      :Weight 30g.   :Colour:black   :Material:ABS      Package Contents:      :1 * Time Lock      Only the above package content, other products are not included.   Note: Light shooting 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.