The VTG Telcor 3.5" Wind Speed Gauge with 3 Cup Anemometer is a vintage-style weather station tool that accurately measures wind speed. Made by the brand Telcor in the United States, this gauge features a wood block display that adds a touch of retro charm to any home or workshop. With a compact size of 6 inches in height and length, this indoor display gauge is practical and reliable for measuring wind speed in a variety of settings.

Was used indoors lakeside to judge wind speed for sailboat races. Cups unit was mounted to a mast outside the home. Could also be dash mounted to your sailboat?

Works perfectly.