This version is for the GCX user. It has the TRS input(left jack) and the Effects Send(right jack) on the front of the panel. The Effects Return(rear jack) is located in the rear. With the GCX input(send) on the front of it's panel and the return from any one of the loops in the rear, this panel will allow you to use a Stereo Cable vs. the standard Stereo Y and 2 Mono Cable approach. For the NON-GCX users, only the single TRS input is located in front and BOTH SEND and RETURN are in the rear.
Both version $70 shipped conus.