The wideband is one unit, the datalogger/tunner is another unit.
You hack a cable to tie the 2 together so you can log 1 file that combines all the data the datalogger/tunner logs with the wideband.
The datalogger already records ALOT of stuff the wideband just makes it that much more precise to tune with.
DX3?.. huh?.. well ZX3 = Zetec the 05-07 has a Duratec so D