Spektrum DX9 Transmitter (Only MD2) 9 fully-proportional channels User-configurable switch and stick assignment Voice alerts&#8212;transmitter can speak to the user in 5 different languages ** (English, German, Spanish, Italian, and French) Wireless trainer system with model match&#8212;instructors can work with multiple students without having to re-bind to each student Virtually unlimited model memory&#8212;transmitter stores up to 250 models and only populates the model list with models the user has configured