What is the difference of GM Tech2 Diagnostic Tool

GM Tech-2 is the same tester Technicians use to diagnose GM vehicles. The Vetronix Tech 2 comes with Authentic GM software and provides support for on-board diagnostics on all GM systems 1992 thru 2014.

Our website have 5 different gm tech tool,some may be confuded what is the difference?how to choose gm tech tool?
Our five GM Tech Tool Comparison:

You may notice that the SP23-B3 will save a lot of shipping cost,and no cutoms clearance problem like before.But without plastic box,it can be taken out conveniently.

Finally,for the price,SP23 is the best price ones.But for total price including the shipping cost,the SP23-B3 will be better price.