Features:1.Fully aluminum alloy enclosure, anodized, can test analog and digital servos, can control ESC (motor stepless speed regulation test)2.It can simultaneously test whether 3 servos are synchronized (this function is mainly applicable to helicopter steering gear in CCPM mode)3.There are 3 modes to check servos or ESC:4.Manual mode: turn the knob with different speed, check the reaction time;5.Neutral mode: make the servo go back to the neutral point;6.Automatic "window wiper" mode: make the servo swing like a window wipers in the biggest angle.7.It can connect 1-3 servos simultaneously and test such as 1-3 servos consistency and so on.8.You can also connect 1-3 ESC to test and compare their reaction time respectively.9.It can connect 3 servos of the CCPM helicopters, and select servos by neutral and synchronous functions10.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. Specification:Material: aluminum alloyInput voltage: DC4.8-6vChannel: 3CHWeight: Approx.28g/1oz Package list:1 x 3CH ESC Servo Tester