Great Tool to check and compare servo performance. I find it very usefull to set neutral position at servo instalation process.
you can buy this G.T. Power 3 Servos / ESC Consistency Master at Remote Control Model Free Shipping Shop
In three modes to check Servos or ESC:
Manual mode – Turn the knob will 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.
It can connect 1 – 3 servos simultaneously and test such as 1- 3 servos consistency and so on.
It can also connect 1 – 3 ESC 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.