BeschrijvingMultiSwitch Plus
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Add a MultiSwitch Plus to your Compadre, Iridium, Riverside, Sunset, or Volante and gain instant access to presets 1, 2, and 3. Or connect three pedals to MultiSwitch Plus using additional TRS cables (sold separately) to access three synchronized presets on three pedals simultaneously.
A lot more technical information here - Strymon