The Kestrel model #3500 and #3500 NV are built to last. Both of these models, are small, light, durable, and very accurate. They measure 6 different weather conditions. Quickly and very accurate in their readings. Many people like to use theses for long range shooting. It’s the wind speeds, and wind gusts readings they find attractive with the Kestrel 3500 & 3500 NV.