Brushless Motor 3650 3900KV and 60A ESC Combo SetFeatures:Water-proof Motor:✔High Purity CopperWindings Maximizes Efficiency✔High RPM ABEC5 Oversized Bearings✔Precision balanced rotor, removable/replaceable rotor✔Specially designed for 1/10 rc car, waterproof,a good choice for your rc car.Water-proof ESC:✔Specially designed for RC car, water-proof and dust-proof for all-weather races.✔Excellent start-up, acceleration and linearity features.✔The strong resistant current capability, excellent heat dissipation.✔Multiple protection features, widely compatible with for 1/10 RC carNoticeThis 60A ESC is best to use 2S battery, please do not use this 60A ESC together with 3S Battery or above 3S battery to avoid short circuit!!Specifications:Motor:Watts: 900WMax voltage: <22V Max Amps: 41AKV(RPM/Volt): 3900KVMax RPM: 50000Plug type: 4mm golden banana plugShaft length: 15mmShaft diameter: 3.175mmDiameter: 36mmLength: 50mmWeight: 180gESC:Cont/Burst Current: 60A/320AMotor Type: Sensorless brushless motorSuitable brushless motor: ≥9TResistance: 0.0007ohmBattery: 2-3cells Lipo/ 4-9cells NiMHBEC Output: 5.8V/3A(switch mode)Diamension:50 X 35 X 36mm (1.97 x 1.38 x 1.38in)Instuctions1. Connect BEC wires with the receiver2. Connect motor wires with ESC3. Turn on the transmitter4. Connect battery pack with ESC then switch on the ESC.5. When the connection of motor and battery is finished, the motor emits"Beep-Beep"tone.6. When the throttle stick is in the neutral position, the motor re-emits "Beep-Beep"tone.7. The ESC is workable.8. please read product manual(ESC)Package1 X 3650 3900KV Brushless Motor1 X 60A ESC2 X product manual