It mostly a bullshi* machine. They want 125 bucks. Go to auto zone or advanced and get an actron ,you get more for the buck. You can read -erase codes with it, live data + snapshot data etc. Its about 149 bucks. They make a few cheaper ones too. Look around. Those TV sales things are garbage.
Take a look at topsy turvy tomato thing. My woman got one ...against my judgement. The thing didnt work. Why you ask....BECAUSE tomatoes dont grow upside down, it takes to much energy from the plant to survive upside down let alone produce fruit.Think about it.What a gimmick.My better boys in the garden ( 4 plants) put out 2 bushels of nice tomatoes, and I ignored them for the biggest part.
Look at actron site,stayaway from tv junk