Nothing produces that classic "British" sound like a Marshall amplifier, whether it's a combo or head and cab configuration.The Marshall Code Series amplifiers recreate decades of classic Marshall sounds in a single amp. This 2-way momentary footswitch is designed for use with the CODE Series amps, giving you hands free access to up to 100 presets. Switch one is to scroll up through the amps presets and switch two scrolls down the presets. It has built in indicator lights to show you which control is being used so you can't accidentally go the wrong way. The PEDL-91010 lets you get the most out your CODE's capabilities.