Traxxas XL-5 Waterproof Electronic Speed Control (Low-Voltage Detection, FWD/REV/Brake). The XL-5 Electronic Speed Control handles the elements while smoothly supplying power to the motor. This high-performance ESC packs impressive features that are normally only found on more expensive high-end replacement units. The XL-5 features a completely waterproof design, three throttle profiles, low voltage detection, Thermal Shutdown Protection, 4-7 cell NiMH and 2-cell LiPo compatibility, and built-in BEC. High frequency operation combined with ultra-low resistance make the XL-5 an efficient and ultra-smooth fully proportional speed control. The exclusive and patented Training Mode™ reduces the overall power output of the XL-5 by 50%, making it easier for young or new drivers to develop their control skills before unleashing full-power. The XL-5 is backed by the Traxxas Lifetime Electronics Warranty. TRA-3018R