Word's Champion's choice, ROAR APPROVED Redesigned new architecture platform 40% smaller in volume* (*6mm shorter, 6mm smaller in width) 24% lighter in weight (12g lighter than the previous generation) Premium MOSFETs (Toshiba MOSFETs) Super BEC. Internal BEC features booster circuitry can output the current/voltage of up to 6A/6V and power various servos without connecting any extra receiver battery. Built-in electronic switch (with a lifespan of over 50000 on/off cycles, dust-proof and shock-resistant design) Built-in capacitor module saves space and weight making the wiring simple and neat. PWM Frequency tuning - guarantees precise and accurate throttle and brake control for all classes of competitions (esp. the Stock class). Maximum Cooling performance - Separate Programming/Fan Port The separate PRG/FAN port on the ESC can power an external fan to maximize cooling performance or connect the ESC to an LCD program box or WiFi module for ESC programming.