This is more, much more, than a PC based vacuum gauge set. The software runs on a standard Windows PC and shows a huge amount of data gleaned from intake vacuum measurements. It displays the average vacuum on a bar chart for carb/throttle body balancing but also plots the vacuum on a graph against time from which you can detect issues such as leaking inlet rubbers as well as poor seating of exhaust and inlet valves. If you really read up on the significance of the graph traces you can identify more complex issues with the carbs/throttle bodies. Each cylinder is given a colour, No 1 Black, 2 Green, 3 Red and 4 Yellow making it easier to distinguish between the graph traces. The software is easy to use and provides a plethora of data including minimum and maximum vacuum for each inlet as well as average figures. One can switch on and off inputs in the software to get a clearer look at individual cylinders. The software will record a diagnostic session which can be played back at any time for reappraisal or just to impress your mates down the pub. The recorded session can be played back as though it were a master video with full functionality ie you can turn on and off channels zoom in etc. For simply balancing carburetors or throttle bodies it makes life very easy. As with any vacuum analysing tool you connect the pipes to the intake outlets which are sometimes on the carbs or little stub pipes on the inlet rubbers as in the case of Kawasaki's mighty Z1 series bikes. The little black box is then plugged into the USB port of your Windows laptop and the software is easily downloaded from the website and installed. I am very reluctant and impatient when it comes to learning new software, but fortunately this is so easy to use I found a bit of poking here and there with a mouse and all was working without resorting to a manual. When balancing carbs/throttle bodies the bar graph background turns green when they are well within tolerance which makes it so easy. The Dsynch2 is supplied in a plastic case.