I have four of them for my pedalboard, using a Rocktron Midi Raider Midi Controller and a Rocktron Midi Xchange together ("midi out of the Midi Xchange to midi in" of the Rocktron Midi Raider, two FC-7 pedals for every unit). And when i want to play my Yamaha Motif ES-6 Synthesizer i use one for sustain. This is the most usable and most reliable expression pedal you can buy. Thid will work for all eternity without any problem. And it is compatible with almost every synth,controller,etc. I love this product, it has the right range. Wah-Wah, Whammy tricks with Pitch Shifter effects, every parameter on guitar/bass rack effects, Synthesizers, Keyboards,etc. Very detailed range also. You get more of what you pay with this product. Congratulations Yamaha Corporation!