Key FeaturesBattery Eliminator Circuit (BEC): eliminates receiver batterySafe "Power On"Microprocessor ControlledTough surface mount constructionAudible Arming SignalAuto Motor cut-off with resetLow torque "Soft Start": protects gear boxes and belt drives from shockSmooth reverse exponential throttleSelf- calibrating endpoints: maximizes usable stick travelAuto shut-down when signal is lostSimple setup: no complicated switchesOverviewLarge 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.