I received this footswitch with my 2001RBP Pre amp and have never used it (just verified that it does work). - comes with the MIDI cable. i have no way to check the horn/Mute button (#1 of the 3 switches) because I don't have the full amp to try it on (the red light does toggle on & off when you hit the switch on & off). The Tuning Mute button does work but the light didn't seem to turn on indicating that the mute was engaged. Channel switching worked perfectly and the light on the footswitch corresponded with the selection. Lets go [DEL]$50 [/DEL] $40 shipped CONUSA/PayPal accepted. Pics to come later.