CRYO-DRIVE™, Castle’s latest break-through technology, minimizes the amount of time the ESC’s electrical components spend generating heat. These software advancements work in parallel with a unique open housing design to allow increased directional airflow to cool critical components. With the integration of a 40mm fan and a forged elliptical fin heatsink, the new design maximizes airflow through the system, taking thermal performance to a whole new level. The results are cooler ESC temperatures, increased runtime and more power handling. What's in the Box? (1) 1/6 Mamba Monster X 8S 33.6V Waterproof ESC 8A Peak BEC (1) Product Manual