AirTurn BT500S-4 Foot Switch ControllerThe AirTurn BT500S Series combines the features and performance of the classic BT200 series. It is created with the look and feel of a traditional stompbox style pedal with optional 9v power supply, making it easy to add to your existing pedalboard. It is built with industrial grade steel switches, and encased with a nearly indestructible polymer blend that doesn't interfere with the radio signal and still holds up to road wear. Along with the ability