The Kestrel Elite with Applied Ballistics and Link is the top of the line, most widely used environmental and ballistic device on the market. These devices will take environmental readings at your location and apply them to the proven Applied Ballistics ballistic program. What this means is you will be able to make accurate shots at long range even when changing your environment. It also features a wind vane to accurately display the wind value at your location so you can make the best shot possible. The Link feature allows you to connect to your phone via Bluetooth for firmware updates and updates to Litz's bullet BC list. You can also edit your firearm profiles and share data back and forth between the Kestrel and your phone for speed and ease of use.