The XRAY XMC180 Electronics Speed Controller (ESC) with Reverse has been specially designed for the XRAY M18 micro racecar. Based on SMD technology, the result is a very small high-quality electronic device. The ESC features reverse, proportional throttle and braking, and battery elimination circuitry (BEC). The XMC180 ESC is designed for use only with the micro stock motor. DO NOT use this ESC for micro modified or super size motor, as this will damage the ESC.