Team Orion’s Vortex R8.1 Pro brushless speed controller is a purpose-built 1/8th scale ESC for heavy duty competition use. Based on the World Championship winning R10 Pro the R8.1 offers an aluminium heatsink case, dual sensor ports and an advanced and highly programmable software to fine-tune the throttle and brake settings to your liking. The 4S-compatible controller also sports an adjustable 6V to 7.2V BEC system to allow the direct use with high-voltage compatible servos and a specially designed fan guard helps to protect the highly stressed fan unit.