Water & Wood Servo Tester CCPM Consistency Master Checker 3CH 4.8-6V Manual mode: turn the knob with different speed, check the reaction time; Neutral mode: make the servo go back to the neutral point; There are 3 modes to check servos or ESC: Automatic "window wiper" 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.