My set is a lot older and only has some wires and the adapters to connect the spray can to the injector and power the injector open. What is nice about this one is that the control lets you apply single or multiple pulses to open the injector to let the cleaner run through it. For bad injectors you need to shoot continuous pulses to vibrate the pintle open.
With my old setup, I had to use an old doorbell transformer with a diode to make the continuous pulses. I have seen videos on YouTube where the pulses were made by dragging a wire across an old file or saw blade. The box with this kit does that for you.
Once I got some cleaner flowing through I set the injector aside for 10-15 minutes to soak before pulsing it again and doing a flush with a shot of cleaner. Repeat a few times until the pulses give a good stream out of the injector. It isn't really rocket surgery. There are lots of videos on the internet to show how its done.
When they are all done, I put them in a ZipLoc bag until I needed them.
One note: A reviewer said that they had some problems with the spray adapters working with some carb cleaner cans and posted a photo of one that worked for him.
You will need rebuild kits for the injectors with o-rings, filters, and pintle caps. You should be able to get them at an auto parts store, or online from Amazon or eBay.
