Goliton&reg; 2845 3000KV KV3000 Sensorless Brushless Motor for RC Car Boat High torque and high efficiency,the overall efficiency exceed 90 percent. Low heat production, long lifetime, strong overload protection and it can function 95% of its features without any heat sink appliance. High intense aluminum alloy anodizing shell,front and back cover, high-performance temperature-resistant magnetic steel and imported high-speed bearing.