I've had a bunch of 8500s over many years and now I have a X50 and a 9500ix. Until recently I didn't/wasn't paying attention to all the different versions everyone's talking about.... Well now I know there are X50 with S7 & M4 platforms... I think mine is M4 because mine's FCC ID# ends with M4. But when people are talking about Rev. 3 2 etc etc I have no clue what they are or how to identify them.
For the sake of clarifying for anyone interested can we come up with a list of versions? I'll start by listing mine's info (except S/N#)... I've no clue what version though... and it works flawlessly:
8500 X50 Red M4 0907 FCC ID#QKLX5M4 1620X50-0