Products Description: CCPM Servo Consistency Master/Servo TesterThe device can also be used as a signal generator for electric speed controller (ESC), then you can test your motor system without using a transmitter and receiver. There are 3 modes to check servos or ESC:Manual mode: turn the knob at different speed, check the response time. Neutral Mode: Make the servo return to the neutral point. Automatic "wiper" mode: make the servo swing like a wiper at the greatest angle. It can combine 1-3 servos at the same time and test, such as 1-3 servos of consistency and so on. You can also connect 1-3 ESCs to test and compare their response time accordingly. Maybe 3 servos of CCPM helicopters and choose servos. It can also connect the servo of the planes by installing the control box and adjusting the planes, using such neutral mode and so on. Voltage Consumption: DC4.8-6V Size: 48x42x17mm Weight: 31.5g Package Contents:100% Brand New5/10 pcs x Servo Tester