Easy Operation</br>Two Expression pedal Inputs</br>Smart Controller</br>Battery Or AC Powered</br></br>Product Description</br></br>The MIDI Xchange is a simple to use?? yet multi-functional MIDI switcher that not only controls Rocktron pro"cts?? but other MIDI switchable products as well. Two built-in expression ports allow you to plug in up to two Rocktron HEX expression/volume controllers for continuous controlling of all sorts of parameters. A great feature of the MIDI Xchange is that it runs on a 9-volt battery?? as well as external power. Thus?? if you are doing a gig where it is hard to run power out to your floor pedals ? you won??t have any problem with the MIDI Xchange as battery operation will allow you to make the preset controller changes you need. And?? the MIDI Xchange is also phantom powerable through select Rocktron processors and amplifiers. A three segment display shows you the preset you are on or which controller assignment has been selected. A power switch is provided to turn on or off the MIDI Xchange. Upon turning on the unit?? the display will flash the number "which point you may either press the RECALL switch to select preset "1" or use the UP and DOWN buttons to select the desired preset number ? then press the RECALL