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This video shows the functions and benefits of using a servo tester. This portable device allows you to test the functionality of your servos and ESC without having to connect your radio, receiver and battery. Servos testers also allow you to easily center your servos when attaching servo horns and making control surface adjustments. This time-saving tool is a must have tool for any RC enthusiast. For product info and customer reviews visit www.motionrc.com/gt-power-serv...