Features: Made of high-quality components to achieve reliable power. High purity copper windings and high-power output raise efficiency. Waterproof characteristic exists in all parts of this set, whch allows it eminently practical, strong and durable. High torque servo provides accurate movement. The ESC features fast response to throttle input and accurate throttle linearity. Multiple protection functions including low voltage cut-off protection for lithium or nickel battery, over-heat protection, throttle signal loss protection and motor blocked protection. The economical combo comes with a 3650 3900kv motor, a 60A ESC and a 20kg servo is more convenient for DIY. Any problem, please contact our store without hesitation. Honor to serve you. Motor