Kestrel Sportsman Weather Meter with Applied Ballistics, Bluetooth LiNK, and Vane Mount Combines environmentals with a ballistics calculator for precise elevation and windage solutions Measures wind speed, direction, crosswind, temperature, humidity, pressure, altitude and more Enhanced Applied Ballistics G1/G7 solver with Aerodynamic Jump, Spin Drift and Coriolis corrections Bluetooth LiNK (iOS/Android): transfer data, monitor conditions, and integrate w/ laser rangefinders Rugged, waterproof and reliable USA-made unit with large backlit screen is IP67 and MIL spec rated