Carson Reflex Pro 3.1 2 Channel 2.4GHz Surface Stick Radio Transmitter with 5kg ServoCarson Reflex Pro 3. 1 2 Channel 2. 4GHz Surface Stick Radio Transmitter with 4 Channel Receiver and 5kg Servo Features: Transmitter operating voltage 4. 8 6V 2. 4GHz system Two continuously variable, fully proportional channels Servo reverse for both channels (change of running direction) Trimming function for acceleration and steering Connector system for Futaba and Graupner JR Charging socket (positive pole inside) Battery charge level display by