Fender MS4 Mustang III / IV / V Head Footswitch - 4-BUTTON PEDAL FOR MUSTANG

(This text is machine translated) The 4-button pedal has three modes of operation which are identified by the three LEDs labeled MODE 1, 2 and 3. The pedal also has a tuner mode which is active when all the LEDs are off. To switch from one mode to another, press the MODE key. To activate Tuner mode, press and hold the MODE button.