Wired E-LINK - X4 InterX Unit
As an alternative to a wireless setup, the wired X4 InterX Unit functions as the intelligent interface to connect the E-LINK evaluation and exercise modules to the computer via the USB port. Up to four E-LINK devices may be connected simultaneously allowing the user to easily and quickly switch between them during an evaluation or exercise session.
The X4 InterX Unit is needed to connect 2 or 4 ForcePlates for balance evaluation and exercise as these devices are NOT wireless.
Both wireless and wired interface units can now be connected to one computer simultaneously
More information about different interface combinations can be found here.