-The device also can be used as a signal generator for electric speed controller (ESC), then you can test your motor system without using a transmitter and receiver.
-3 modes to check 1-3 servos :
-Manual mode: Turn the knob with different speed, check the reaction time
-Neutral mode: Make the servo go back to the neutral point
-Automatic “window wiper” mode: Make the servo swing like window wipers in the biggest angle.