Connect this Fender(R)
4-button footswitch to your Mustang(R) amplifier (included with the
Mustang(R) IV & V, optional equipment for the
Mustang(R) III) to enable remote multi-function foot control.
The footswitch display and LEDs show you some of the same information
as the amplifier screen, so you can, for example, tune your guitar and
select presets by watching the footswitch without ever looking at the
screen onboard the Mustang!