Skymate has been a best-seller for 10 years! Convenient jackknife design, features, accuracy, and price make this a great value in a handheld unit. The jackknife case allows more precise wind speed and temperature measurements because the users hand is distant from the wind impeller and temperature sensor, to measure undisturbed air flow. Skymate is water resistant and has a high-visibility case. For the most precise measurements, it can be used with the optional wind tunnel, Model SM-WT; or tripod mounted using the optional tripod mounting fixture. The SM-18 wind meter is designed with a wind speed accuracy of better than +/- 3% and includes a 2-Year warranty.