Handy anemometer by Inspeed (we make them!). Many thousands in use worldwide. Just mount the wind sensor, connect the display and its running. Uses a Cateye Velo8 bicycle speedometer for display - good fo 5 to over 150 mph. Accurate as ones 4X the price. Great for home, RV, recreational use... Comes with 25 wire but works with hundreds of feet - we can provide or add your own! Any 2-conductor wire will work!