The device can be used as a signal generator for servo motors testingor for electric speed controller (ESC), then you can test your motor system without using a transmitter and receiver.
There are 3 modes to check servos or ESC:
Manual mode: turn the knob with different speed, check the reaction time.
Neutral mode: make the servo go back to the neutral point.
Automatic mode: make the servo swing like a window wipers in the biggest angle.
It can connect 1-3 servos simultaneously and test such as 1-3 servos consistency and so on.
You can also connect 1-3 ESC to test and compare their reaction time respectively.
Voltage consumption: DC4.8-6V
Size: 48 x 42 x 17mm
Net weight: 7g