I am sending a money order for $65 to this fellow in Ireland who makes the midi sustain pedal. He informed me that it is 4 1/2" x
2 1/2" X 1 1/4". It runs on a 9 volt battery. You need to plug in a footswitch and to plug the unit into the midi input of your keyboard. This will free up the pedal I use for sustain for another purpose: namely to trigger fills.

Beakybird