3650 3900KV Brushless Motor +120A ESC Combo Set for 1/10 1/8 RC Car Accessories Product Feature High-quality material is durable and eco-friendly. 4 poles with 12 slots design provides high torque and efficiency. Copper windings with high purity can maximize efficiency. Precision balanced rotor, smoothness for best reliability, and maximum RPM. ESC has enhanced throttle response, excellent acceleration, powerful interruptions, and super smooth and accurate throttle linearity. Dual-ball bearings design. Splashproof and dust-proof for all-weather races. (The programming card is not included) Multiple protection features: Low voltage cut-off protection, over-heat protection, and throttle signal loss protection. Premium RC car upgrade parts are suitable for most 1:8, 1:10, and 1:12 remote-control cars. How To Use ?? 1. Connect BEC wires with the receiver. ?? 2. Connect motor wires with ESC. ?? 3. Turn on the transmitter. ?? 4. Connect battery pack (not included) 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. Note ?? Warm Tips: The battery is suitable for a 2S battery. But try not to use a 3S battery. When using the 3S battery, the motor needs to be replaced with one below 3000KV. ?3650 3900kv Motor Watts900W Max voltage<13V Max Amps69A KV(RPM/Volt)3900K Max RPM50000 Diameter36mm Length50mm Shaft length15mm ?120A ESC Continue current120A Burst current320A Battery2S Li-Po / 4-9S Ni-Mh Ni-Cd BEC output5.8V / 3A Power supply plugsT plug male Package Included 1 x Brushless motor 1 x Brushless ESC