The new Kestrel Elite Weather Meter with Applied Ballistics which has been referred to as the Kestrel 5700, is an updated version from the Discontinued Kestrel 4500 Applied Ballistics Meter in November of 2015. That being said... functionally, you're not getting more environmental or ballistic features. So don't feel the need to upgrade unless you find the other exciting changes necessary.

• Bluetooth LINK to Smartphones / Mobiel / Android / IOS
• Works with Bushnell CONX Range Finder
• 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.

If you select the Bluetooth Kestrel LINK model, you'll want to download the Kestrel LiNK Ballistics app to your smart phone 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 site (walls or obstacles will effect this range).

There is a free app for both Android and iPhone for the Ballistic Profile Loader. This is what you use to load your Gun/Ammo combinations to the Kestrel. You can NOT load your gun profiles from the Dongle.

The Kestrel 5000 USB cable is an option. This is most common to use with multiple meters. Example being, you need 20 AB meters, and you want to save money by not purchasing the LINK meters. You could get 20 non LINK meters, with just 1 cable and load up all your meters with the Mac/PC version of the Profile Loader.

All 5000 series meters will have both a bright green backlight, which is great for even high sunlight conditions, and a night-vision preserving backlight. The red night vision (NV) backlight incorporates optical filter to reduce overall brightness and minimize blue and green spectrum light to preserve night vision. (Note: This 'night vision' is not compatible with night-vision equipment.) Basically, with the red backlight, your eyes don't need to adjust when looking from your meter to the horizon in night time use.

This Kestrel 5500 with Kestrel LINK will work in conjunction with compatible range finders like the new Bushnell Elite 1 Mile CONX range finder you've been reading about. It will also work with many other apps on the market for ballistics and weather functions. It's the most popular for ballistic applications due to the compass with crosswind functions.

The Kestrel applied ballistics meter combines sophisticated environmental sensing features with long-range shooting ballistics information in one hand-held device. The built in Applied Ballistics software provides all of the following:

• The accurate and trusted ‘Litz’ library of G1 and G7 referenced Ballistic Coefficients (BC’s).
• Custom drag curve modeling; helpful in engaging targets beyond the supersonic range of the bullet.
• Ballistic Calibration (truing) feature allows you to ‘train’ the solver based on actual bullet impact.
• PC Loader software; build firearm profiles on your computer and transfer them via wire or Bluetooth

The Kestrel Shooter's Weather Meter with Applied Ballistics Technology measures up to 15 environmental parameters and allows users to select from either G1 or G7 ballistic coefficients (BC) when calculating a trajectory at the range. The handy, portable meter also offers the “Litz” measured BC library of over 225 bullets, which is considered to be the most extensive source of measured data for modern small arms bullets. Users can also train the Kestrel Shooters Weather Meter with Applied Ballistics software to match a specific rifle based on observed impacts at long range with the ballistics calibration feature, which offers even more accurate data points for users to rely on. With easy access to more accurate BC data, shooters have everything they need to make a much more precise trajectory calculation in a compact and durable Kestrel meter design.

The Kestrel Shooter’s Weather Meter with Applied Ballistics allows users to select either G1 or G7 ballistic coefficients, or to be even more specific and select from an entire library of Applied Ballistics Custom Curves for more than 200 common long-range bullets.

Please note that access to the full Applied Ballistics Custom Curve library REQUIRES the Applied Ballistics Profile Loader via the Cable, or loaded from you smartphone, free from the App Store or Google Play. For full gun and bullet profile customization and backup, we recommend our customers purchase the unit with Bluetooth wireless data transfer for ease of use and functionality.