I had to order this twice because the first one was damaged and I really wanted to give a good review so I asked for a replacement and they came. As soon as you take it out of the box you immediately see everything it comes with, from cables, a car cable and a USB port to a pair of inner tubes for your tires and a battery pack. As soon as you insert the battery into the gun, the blue light will illuminate on the screen, indicating that it is ready. If you want to turn them off, just press the R button. Introduction. You pull the trigger and it starts to deflate, leaving all four of my tires almost completely filled with the charge it already brought in from the factory. It did its job very well, very easy to use, very user friendly. And the instructions are super easy to understand. I'm glad I was able to give him a second chance. Everyone should have it