MAD AMPX 40A(5-14S) V2.0 ESC brushless Motor Speed Controller for long-flight time Drone or Multirotor Quadcopter Hexrcopter and RC DIY Hobby Throttle Loss Protection As checking throttle signal loss over 0.3 seconds, ESC will shut off and will rework after throttle signal recovery. Start Protection When motor is not started up after adding throttle for 10 seconds, ESC will shut off and will resume normal after making throttle zero. Throttle Stroke Setting First connect motor and adjust throttle top, then power on and ESC will beep two times. Second adjust throttle bottom and ESC will beep one time. After finishing these steps, throttle stroke will be set successful.