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 shot on the first try. This meter employs the Applied Ballistics bullet library of custom drag models, an exact measurement of your bullet’s drag profile plus corrections for Aerodynamic Jump, Spin Drift, Coriolis, and Drop Scale Factoring to achieve accurate extended long-range shots. What's new with the Kestrel Elite Weather Meter with Applied BallisticsBluetooth LINK to Smartphones / Mobiel / Android / IOSTakes 1 AA battery (instead of 2 AAA)The battery door is in the back, sealed away from the motherboard, should your battery leak as was common with all the 4000 seriesImproved high-resolution screen for any lighting (even sunlight) and easy on your eyes. Intuitive user-interface screen navigationMultiple Languages: English, French, German, SpanishScratch and breakage-resistant windowAll meters include both options of Red (NV - Night Vision) & White backlights. Slightly bigger, not really noticeable difference. Fits the same cases. Since this meter Kestrel LINK (Bluetooth), you'll want to download the Kestrel LiNK Ballistics app to your smartphone to load your guns/ammo to the meter. The new Kestrel Meters with Bluetooth include the software necessary to communicate wirelessly at a range of up to 100 feet with a clear line of sight (walls or obstacles will affect this range).Kestrel LiNK Bluetooth AppsKESTREL LINK BALLISTICS FOR ANDROID - Download LinkKESTREL LINK BALLISTICS FOR APPLE iOS - Download LinkKestrel Elite Weather Meter with Applied Ballistics FeaturesEmploys the Applied Ballistics bullet library of custom drag models, an exact measurement of your bullet’s drag profile plus corrections for Aerodynamic Jump, Spin Drift, Coriolis, and Drop Scale Factoring to achieve accurate extended long-range shots. Expanded features include a customizable Range Card, and an expanded Ballistics Data Table as well as storage for up to 16 gun and bullet profiles and 5 saved targets. Calculate accurate fire control solutions for long-range rifle shooting. Select either the G1 or G7 ballistic coefficient when calculating a trajectory. Get ballistic coefficient data for more than 225 long-range bullets. The AB Kestrel comes with numerous pre-loaded drag models, but not entire gun/ammo profiles. In other words, you have to build your gun profile, but you can choose from the list of bullets when modeling your ammo. Measure up to 15 environmental parameters at your fingertips."Train" the software to match your specific rifle based on observed impacts at long rangeCalculates and adjusts for gyroscopic spin drift and Coriolis effectAdjust for angleWind speed/air velocityTemperatureWind chillRelative humidityHeat stress indexDewpoint tempWet-bulb tempBarometric pressureAltitudeDensity altitudeWind directionCrosswindHeadwind/TailwindPressure trendModels & SKUs: Kestrel 5700 Elite Meter with Applied Ballistics and LiNK (Black): 0857ALBLKKestrel 5700 Elite Meter with Applied Ballistics and LiNK (Olive): 0857ALOLVKestrel 5700 Elite Meter with Applied Ballistics and LiNK (Tan): 0857ALTANKestrel 5700 Elite Meter with Applied Ballistics and LiNK (Blaze Orange): 0857ALBLZKestrel 5700 Elite Meter with Applied Ballistics and LiNK (Flat Dark Earth): 0857ALFDE Kestrel 5700 Elite Blaze Orange Weather Meter with Applied Ballistics with LiNK 0857ALBLZ