The Kestrel 5700 Elite Weather Meter with Applied Ballistics is a comprehensive weather meter for measurement and logging of primary environmental conditions, including wind speed and direction, temperature, humidity, heat index, pressure, and altitude. It also contains a powerful ballistics calculator to help you hit your long-range targets on the first try. This meter employs the Applied Ballistics library of custom drag models, an exact measurement of your round’s drag profile plus corrections for Aerodynamic Jump, Spin Drift, Coriolis, and Drop Scale Factoring to achieve accurate extended long-range engagements.

What's new with the Kestrel Elite Weather Meter with Applied Ballistics over the previous Kestrel 4500 Applied Ballistics series:

Bluetooth LINK to Smartphones / Mobiel / Android / IOS
Takes 1 AA battery (instead of 2 AAA)
Battery door is in the back, sealed away from the motherboard, should your battery leak as was common with all the 4000 series
Improved high resolution screen for any lighting (even sunlight) and easy on your eyes.
Intuitive user-interface screen navigation
Multiple Languages: English, French, German, Spanish
Scratch and breakage-resistant window
All meters include both options of Red (NV - Night Vision) & White backlights.
Slightly bigger, not really noticeable difference. Fits same cases.

Find more details on manufacturers website here.