what is the difference between gm tech2 in our website www.chinacardiags.com

A great many customers ask us what is the difference about the item sp23 and sp23-1 gm tech2 in our website.
in fact, they are easier to clarify the difference,  they have only one difference. it is the packing.
sp23 gm tech2  is packed with case. easy to save all the parts with the unit.
sp23-1 gm tech2 is packed with carton, so the shipping freight is less.
all the functions are the same.
now you can choose which one you like.