As my tests showed, this digital tachometer is highly accurate and easy to use. It operates on a wide RPM range and provides reliable readings in real-time. The interface is intuitive and features a large LCD screen that's easy to read. The device is small and lightweight, making it EASY to carry around and use in various settings. The only con is that it doesn`t come with a protective case. Overall, it's an excellent tool for measuring RPM in various applications..