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The Servo Tester is a compact and handy tool designed to test and calibrate RC servos, ESCs, and PWM-based motor controllers. It operates without requiring a microcontroller, making it ideal for quick servo diagnostics and tuning. The device offers three test modes: manual, neutral, and automatic, enabling various motion tests. With a simple dial control, users can precisely adjust PWM signals to observe servo responses. It supports 4.8V to 6V input voltage, ensuring compatibility with most hobby servos. A lightweight and portable design makes it a must-have tool for RC enthusiasts and robotics developers.