All Thunderbird controllers are ready to fly straight from the package, no programming necessary. They are defaulted to AUTO LIPO detect and no brake. Should users wish to modify these settings, they may do so using their transmitter or with Castle's incredible Castle Link USB Programming Kit (sold separately).
Thunderbird-54: Large and in charge. The Thunderbird-54 offers gobs of power at an unbelieveable price. You simply won't find this much controller for a better price, certainly not in the import bin! This controller is super for great aerobats such as the Multiplex Acromaster or for smaller powered gliders.