Description: 4 pole 12 slot high-torque motor design,3.175mm shaft diameter 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,Waterproof function motor let your car challenge the muddy road Specification: Motor Specifications: Watts: 900W Max voltage: