The switches allow you to pick which pedal you want to control . There are four input jacks on the back . Three are for the pedals you want to control and the last is to connect to the expression pedal itself . You can switch one pedal on at a time . It ' s basically a hub for multiple expression inputs that you control with one expression pedal . <| sep |> What Pokmon was it when you caught it ? <| sep |> uncle sam has a habit of requiring all new cars made follow a new regulation , refusing to buy a car with a new safety system means you can ' t buy a car newer than the regulation requirement date . fossil fuel powered cars won ' t be able to run for ever . regulators would just counter not pairing your phone by making your phone hard lock when going more than 12 mph but not paired to a car sry cyclists