There are two versions of the MK75, the MK75 (regular version) and the MK75HV (high voltage version).
When looking at these two units they look the same as each other until they are powered on.
There are two ways to tell them apart.. Firstly the MK75HV will say MK75HV on the box that it is shipped in. Secondly when powered on the regular MK75 will say "MKOVE MK75" at the top of the main screen and the MK75HV will say "MKOVE MK75HV" at the top of it's main screen.