Connect this 4-button footswitch to your Mustang GTX amplifier (included with the Mustang IV & V, optional for the Mustang 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! In addition, you can plug both a 4-button and a 2-button footswitch into your Mustang amplifier to expand your remote control options. Also compatible with the MustangGT. FEATURES Control with Presets: Select Mode 1to choose between 3 custom quick access presets Control with Banks: Select Mode 2 to select presets down/up, or in banks of 10 using the buttons labeled Down / Up / Bank Control Effects: Select Mode 3 to bypass Stompbox, Modulation or Delay effects Tuner Mode: Press and Hold the Mode button to activate the on board tuner. The display screen will display the closest no