By using the optional VFS5 VOX foot switch you can switch programs, turn reverb or other effects on/off, or make speed/tap settings using your foot. This is a great advantage when you’re creating sounds or performing live. The VFS5 employs a tough steel design with traditional mechanical foot switches and an extra-long five meter integral jack lead. The VFS5 currently works only with the following models: VT20 , VT40 , VT80 , VT120 , VT15, VT30, VT50, VT100, VX I, VX II, AV30, AV60 and VTX Series.