The 3650 3900KV sensorless motor comes with brushless 60A ESC. The high performance 3650 3900KV waterproof brushless motor is designed to provide both quality and performance at an affordable price. Waterproof function motor let your car challenge the muddy road. It is built from high quality aluminum alloy which is produced from the latest CNC milling machines, and is designed with high power and rotation speed to provide longer run time for 1/10, 1/8 RC car truck.