the Vector expansion module is for the TrackIr 3 only
http://www.naturalpoint.com/trackir/...ector-PRO.html
Vector tech is standart for the TrackIr4
http://www.naturalpoint.com/trackir/...kIR-4-PRO.html
anyway, going for TrackIr4:Pro then
Damn on top of the 99$ the thing costs there's a internatiol shipping fee of 72$
is there any relaible website that sells these TrackIr's for europe?
HunterICX