Electronic Speed Controller Resistance: 0.00028ohm Amps: 180A Peak amps: 860A Input Voltage: 7.4V-14.8V / 2S-4S LiPo Function: Forward/Brake Forward/Brake Forward/Brake/Reverse Forward/Brake/Reverse Forward/Reverse (for Rock Crawler) Forward/Reverse (for Rock Crawler) Motor Type: Sensor and sensorless 2-pole/4-pole, 6-pole sensorless only BEC: 6V or 7.2V, 5A max. Max. kV @2S: 2700kV Max. kV @3S: 2700kV Max. kV @4S: 2700kV Dimensions and Weight Length: 53.5mm Width: 38mm Height: 34mm Weight: 146g