1) 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
2) 3 modes to check servos or ESC:
3) Manual mode: turn the knob with different speed, check the reaction time
4) Neutral mode: make the servo go back to the neutral point
5) Automatic "window wiper" mode: make the servo swing like a window wipers in the biggest angle
6) Can connect 1-3 servos simultaneously and test such as 1-3 servos consistency and so on
