RC Three mode Servo Tester

This allows you to test the functionality of your servos, ESC's and any other servo signal driven device without having to connect your radio, receiver and battery. Servo 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. Features: Has three modes to check ESC or Servos: Manual mode: Turn the knob to adjust the servo.  Neutral mode: Test the center point of your servo Automatic mode: Move the servo to the limits automatically. Single servo output Specifications: Input Voltage: 4.8-6V