Hobbywing QuicRun Fusion Elite Brushless system with integrated speed controller (ESC) for 1/10 scale Crawlers. New updated version of the popular and capable Fusion Pro with shorter lighter motor can, 4s support and high voltage BEC option. Can also be used as a simple waterproof brushless system in any 1/10 car, reverse lock-out is available via programming. Speed Controller integrated into the motor can, more compact, fewer wires, no ESC to mount. Sensored system for precise control, ideal for crawlers but drives great in any car with rapid acceleration and no cogging. Integrated Speed Controller means reliable overheat protection for ESC and motor. Compact 36x49mm long motor can slightly shorter than standard 540 size fits all 1/10 scale crawlers and cars. Powerful programmable 5A BEC with support for 6v, 7.4v and 8.4v to suit high power high voltage servos. 50A ESC, 2300kv motor, supports 2-4s LiPo, 6-12 cell NiMH. Higher voltage gives greater efficiency, less heat, longer runtime and more torque. Uses standard Hobbywing car ESC program card (pictured, optional). See pictures for further details.