KOSO offers you a Mini 4 rev counter designed to accurately display engine speed in real time, enabling better control of performance and optimum engine utilization, especially in off-road conditions. It operates via an easy-to-install induction sensor on the spark plug cable, requiring no complex connections, and can be battery-powered for stand-alone use. Its LCD display provides a clear readout, while its compact, rugged design guarantees excellent resistance to vibration, humidity and extreme motocross conditions, ensuring reliability, durability and ease of use on a daily basis.