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Simulates a receiver so you can test your motors, ESC and servos without having to use your radio. Controls your speed control by providing a variablepulse that simulates the output signal of an RC radio receiver. Power requirement: 4.8-6 Volt Battery or BEC. Precise Centering Indicator Servo Cycler Feature Easy connection and operation. Universal connectors.
 "Maxx Products MX 8340 Servo Driver Pro")