Feature:1. Safe Power on Function: When the power is on, the motor will not be started immediately no matter the throttle rocker is in any position to avoid personal injury.2. Throttle Stroke Calibration Function: Adapt to the difference of throttle stroke of different remote control, improve the linearity of throttle response, with smooth, delicate speed control feel and first-class speed regulation linearity.3. Low Voltage conservation Mode: Reduce power/turn off the output, the default is to reduce power. Low Voltage conservation Threshold: Low/medium/high, the default is Cut-off discharge voltage.4. 40A Brushless Electronic Speed Controller with 5V 3A BEC 3.5MM Banana Head for Airplane Aircraft Helicopter Boat FPV F450 Mini Quadcopter.5. If there are any problems, please contact our store in time.Specification:Features:Safe Power on Function: When the power is on, the motor will not be started immediately no matter the throttle rocker is in any position to avoid personal injury.Throttle Stroke Calibration Function: Adapt to the difference of throttle stroke of different remote control, improve the linearity of throttle response, with smooth, delicate speed control feel and first-class speed regulation linearity.Low Voltage conservation Mode: Reduce power/turn off the output, the default is to reduce power. Low Voltage conservation Threshold: Low/medium/high, the default is Cut-off discharge voltage.40A Brushless Electronic Speed Controller with 5V 3A BEC 3.5MM Banana Head for Airplane Aircraft Helicopter Boat FPV F450 Mini Quadcopter.If there are any problems, please contact our store in time.Specifications:Item Name: 40A Brushless Electronic Speed ControllerCurrent: 40AType: XT60 PlugOutput Capacity: Continuous Current 40A, Short-time Current 55A (not less than 10 Seconds)Power Input: 2-4 Lithium Batteries(Not Included)BEC Output: 5V@3A (Linear Regulator Mode-Linear Mode)Maximum Speed: 210,000 rpm for 2-pole Motor, 7000 rpm for 6-pole Motor, 35,000 rpm for 12-pole MotorSize: (Approx) 68*25*8mmPackage Information:Package Size: 12.8*9*3cmPackage Weight: 33gPlastic PackagePackage List:1* 40A Brushless ESCPackage List:1* 40A Brushless ESC