Important: This is a digital tachometer with a measuring range of 0-999 RPM, a power supply of 8-24V, and a measuring accuracy of ±0.1%. LCD Display: This digital tachometer uses a 4-digit, 0.56-inch green LED display. It provides a better visual experience and easier reading. Excellent Features: This digital tachometer features high accuracy, fast response, stability, and reliability. Application: This digital tachometer can be used in various speed measurement applications.