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,Waterproof function motor and Waterproof 60A ESC let your car challenge the muddy road Suit for 1/10 RC Car Truck Crawler Boat. Specification: Motor Specifications: Watts: 900W Max voltage: