In three 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 "window wiper" mode-make the servo swing like window wipers in biggest angle.
It allows to test 1 -3 servos simultaneously.
It allows connection of 1-3 ESCs as to test and compare their reaction time respectively.
It can connect 3 servos of the CCPM helicopters and select servos.
It can also connect the servo of airplanes. Install the steering-box and adjust planes by using such as the neutral mode and so on.

Specifications:
(1) Output: ≤ 15mA (5.0)
(2) Input: DC 4.2-6.0v
(3) output signal: 1.5ms ± 0.5ms
(4) Size: 46 * 32 * 17MM
(5) Weight: 8g
(6) adjustment: manual, automatic, neutral.