The Raymarine ST 4000 Wind Gauge E22047 is a high-quality electronic device designed to accurately measure wind speed and direction for marine navigation purposes. Manufactured by Raymarine, a reputable brand known for producing reliable boat parts and electronics, this wind gauge is specifically designed for boats and sailing vessels. With its durable construction and precise measurements, the Raymarine ST 4000 Wind Gauge is a valuable tool for ensuring safe and efficient navigation on the water. Tested works great