Features:  

²  The device also can be used as a signal generator for ESC, then you can test your motor system without using a transmitter and receiver.

²  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.

²  Size:  36.5 x 31.0 x 22mm

²  Pulse Width Range:  1ms-2ms