The only receivers that respond to the Airwire throttle are the Airwire receiver and the GWire receiver from QSI. The QSI Magnum isn't a decoder just an adapter board. When you order the Magnum set you get the Magnum adapter board and a QSI Aristo sound decoder. The QSI Aristo sound decoder no longer has the polyswitches installed in them. You can also order the Magnum board separately if you want it for something alone.