CN Germany 55A Brushless Speed Controller. Spec. Amp rating: 65A. Burst Rate (10sec): 75A. BEC Output : 5.5V / 3A. Voltage: 2-4S. Dimensions: 36x50x8mm. Weight: 45g. Main Functions: Safety mode: The motor wont start no matter what the position of the control stick is when switch on the RC unit. Brake setting: On/Off (factory default is off) Low current protection: Ignore/Reduce power/Shut off Temperature protection: Reduce power when temperature reaches 120C PWM frequency: 8Khz/16Khz Three point battery type and low voltage selection. Software reversion of motor turning selection.