Precise details: Metal Case Multi-function 3CH ESC Servo Tester Digital Analog CCPM Consistency Master Checker For RC Aircraft Description: Input voltage:4.8-6V Size: 48 x 42 x 17mm Weight: 31.5 g Features Full aluminum alloy shell Anodized process, can test the analog and digital servos Can control the ESC (motor stepless speed test), and can simultaneously test whether the three servos are synchronized Functions 1.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 the biggest angle. 2.It can conncet 1-3 servos simultaneously and test such as 1-3 servos consistency and so on. 3.You can also connect 1-3 ESC to test and compare their reaction time respectively. 4.It can connect 3 servos of the CCPM helicopters, adjust the helicopters and select servos. 5.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. Package Included 1 x Servo Tester