How to set Throttle stroke calibration:
1.Connect the ESC with motor, another end connect with receiver.
2.Turn on the remote controller and push the throttle to the highest point
3.Plug the ESC into batteries
4.There has double click sound (the highest point of the throttle confirm)
5.After get the click sound take the throttle stick to the lowest point
6.Confirm the three click sound  that means OK
Note: The three lines of the brushless ESC can be connected at will. If the steering is not correct, you can adjust any two of them.