Features 1、4‑pole 12‑slot high‑torque motor design and high‑purity copper winding can maximize the efficiency. 2、Precision design for maximum energy conversion, conserve energe, and provide longer use time. 3、Precision balanced rotor, smoothness, best reliability and has maximum RPM. Support program card adjustment. 4、Enhanced throttle response, excellent acceleration, strong braking and throttle linearity. 5、Waterproof and suitable for various competitions conditions, low voltage cut‑off protection, overheat protection, and throttle signal loss protection. Item Type: 540 Motor+ESC Set Material: Aluminum Alloy+Plastic Motor: Color: Red Motor Size: Approx. 50x36mm/2x1.4in Voltage: 820W Maximum Voltage: <13V Maximum Current: 60A KV(RPM/Volt): 3900KV Maximum Revolving Speed: 50000 Shaft Length: Approx. 15mm/0.6in Shaft Diameter: Approx. 3.2mm/0.1in Plug Type: 4mm Banana Plug ESC: Sustained Current: 60A Peak Current: 320A Suitable Battery: 2-3S Li-Po/4-9S Ni-Mh Ni-Cd (Not included) BEC Output: 5.8/3A Plug: Male T Plug Compatibility: for 1/10 RC Car Weight: Approx. 229g/8.1oz Package List 1 x Brushless Motor 1 x Brushless ESC 1 x Instruction