Feature: 1. Safe Power on Function: When powered on, no matter where the throttle rocker is, the motor will not start immediately to avoid injury. 2. Throttle Stroke Calibration Function: Adapt to the difference of throttle travel of different remote controllers, and improve the linearity of throttle response. 3. Excellent Speed Adjustment Linear: With smoothing, delicate speed control feel and excellent speed adjustment linear. 4. Low Voltage Protection: Low voltage protection mode, reduces power and turns off output. The default is reduced power. 5. Strong Anti Interference Ability: The power input terminal adopts the electrolytic capacitor with ultra low impedance and large capacity, with strong anti interference ability. Specification: Item Type: Brushless ESC Material: Electronic Component Color: Black Continuous Current: 40A Peaking Current: 55A (10 Seconds) Voltage Range: 4V-16V Applicable Battery: 2-4s Lipo BCE Output: 5V 3A Motor Plug: 3.5mm Gold Banana Head Power Plug: XT60 Male Applicable: Fixed Wing Aircraft for T rex 450, V2 Helicopter, F450 Small Quadrotor, Etc. Package List: 1 x Brushless ESC1 x User Manual