features enhanced throttle response,excellent acceleration, strong breaks and throttle linearity. Equipped with programming card allow you to conveniently program your ESC settings. Features: High-torque and high-efficiency High purity copper windings maximizes efficiency Precision engineered for maximum energy conversion Precision balanced rotor,smoothness for best reliability and maximum RPM Super smooth and accurate throttle linearity Built-in high-efficient and high-power 6.1V/3A SBEC Mutiple protection features: Low voltage cut-off protection for lithium or nickel battery, Over-heat protection, Throttle signal loss protection, Motor blocked protection Motor