Optoelectronic digital display: Use optoelectronic digital display, it intuitively and clearly displays the speed of the spiraled , making it convenient for users to quickly obtain data. design: Handheld design, lightweight and easy to carry, allowing for speed testing, convenient and practical. Highly precised measurement: With highly precised speed measurement function, ensuring accuracy and reliability. button simple and easy to use, button start measurement, convenient and fast . Multifunctional display: In addition to speed display, it can also display other related data, providing more comprehensive information .