Features: 4 pole 12 slot high-torque motor design.High purity copper windings maximizes efficiency.Precision engineered for maximum energy conversion.Precision balanced rotor,smoothness for best reliability and maximum RPM.Mutiple protection features: Low voltage cut-off protection, over-heat protection, throttle signal loss protection.Bulit-in 5.8V/3A BEC.Suit for 1/10 scale RC car.Specification: Material: Aluminium AlloyColor: Shown As PicturesWeight: 102 - 305gOptions: Motor+ESC, Motor, ESCType: RC Model Part & AccesBrushless Motor Specifications:Watts: 900WMax voltage: <13VMax Amps: 69AKV(RPM/Volt): 3900KVMax RPM: 50000Diameter: 36mmLength: 50mmShaft length: 15mmShaft diameter: 3.175mmPlug Type: 4mm golden banana plugPackage List:1 * Motor .