This digital storm chaser anemometer with dual display is deisgned specifically with the stormchaser in mind. NOW WITH RUBBER COATED MAGNETS. Wind sensor registers speeds up to125 mph (Cateye Velo7). [If you want the display that registers up to 200 mph (Sigma Sport MC10) please visit our web site]. The Storm Chasers magnetic mount lets you monitor the wind from inside your vehicle, not outside! For increased durability, consider our metal rotor option! Mount the Vortex Storm Chaser wind sensor firmly on your stormchaser vehicle, run the wire into someplace safe, dry, and warm, stick the display where you can easily see it - and you can get a wind measurement without getting wet or pelted by hail or flying debris! The Storm Chaser is fully portable, comes with 25 feet of wire and a male/female jack connection, so you can leave the wind speed sensor installed and remove the display when not in use.