Specification: Item Type: Electric Speed Controller Material: Plastic+Alloy Color: Red Black Size: Approx. 60x45x45mm/2.4x1.8x1.8in Weight: Approx. 201.0g/7.1oz Continuous Current: 120A Maximum Current: 600A Motor Type: Sensorless and Brushless Motor Resistance: 0.00035ohm Battery: 3-6 Cells Lipo / 9-18 Cells NIMH Bec Output: 6.1V/3A (Switch Mode) 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 4 . If the car can't be speed up , please check either voltage of the battery pack is too low or the temperature of ESC is too high . If the voltage of the battery pack is too low , please replace the battery pack . If the temperature of ESC is too high , please check all connections . If not , please push the button EPA on your remote control 5 . If the car stops suddenly while in working state , please check the motor's connections , and the road 6 . If the car runs in the opposite direction , which the transmitter is available , please swap two wire connections between the ESC and the motor Package List: 1 x Electric Speed Controller 1 x Manual