Specification: Item Type: Motor Set for RC Car Material: Plastic + Metal + Electronic Components Color: Black Red Weight: Approx. 575.0g/20.3oz 4076 Motor: KV (rpm/volt): 2000KV Wattage: 2800 Maximum rpm: 50000 Maximum Voltage: <21V Maximum Ampere: 135A Number of Rotor Poles: 4 Diameter: Approx. 40mm/1.6in Length: Approx. 76mm/3.0in Shaft Size: Approx. 5.0mm/0.20in Shaft length: Approx. 18mm/0.7in Connector: Approx. 4.0mm/0.16in 150A ESC: Continuous Current: 150A Maximum Current: 720A Applicable Motor Type: Sensorless and Brushless Motor Resistance: 0.00030ohm Battery: 3-6 cells Lipo / 9-18 cells NIMH BEC Output: 6.1V or 7.4V/3A (switch mode) ESC Size: Approx. 60x45x45mm/2.4x1.8x1.8in Compatible with 1/8 RC cars Troubleshooting: 1 . If after power on , motor can , t work , no sound is emittedplease check the connections between battery pack and motor . 2 . If after power on , LED flashes , please check the voltage of battery pack , which should be from 5V-25.5V 3 . If the motor emits a " beep-beep " tone Only ( BEC voltage 6.1V ) or If the motor emits a " beep-beep " twice ( BEC voltage 7.3V ) , please check all the connections : BEC wires , transmitter andreceiver , throttle signal wires , etc . please check the transmitter TH . TRIM and adjust it to the motor re-emits Beep-beep tone Package List: 1 x Motor 1 x ESC 2 x Manual