Well do some research before you buy one. I looked for a scanner that would show cam/crank signal and most do not. This is not mentioned as what it WILL do. This is what they say "Live Data Stream : Show the information of continuous data stream from a vehicle in a live graphic (waveform) display." They say "and more" but don't give details on what they(more) are. You have to contact the manufacture for that info. I am looking for a windows based software that WILL show cam/crank output(graph style) and only found one. Some have it available as a "upgrade" to add it. If any of you have any good sources please post. The scanners i looked at where in the $100-150 range, Not sure what you consider "real expensive".