The ENGL Custom Footswitch Z-5 is designed for ENGL amps that are equipped with the 9-pin Custom Footswitch Port. It enables you to select four channels directly by combining the Clean/Lead channel switching and Gain Lo/Hi switching. Furthermore you can remote control two other functions (e.g. Reverb and V.L.S. at the "Screamer 50" models or Contour and Master A/B at the "Ritchie Blackmore Signature" amp). Power is supplied to the footswitch via the special connector cable.