Kestrel Ballistics has combined precise Hornady trajectory solutions with its own onsite environmental measurements in the Kestrel 5700 Ballistics Weather Meter with Hornady 4DOF. Ideal for precise long-range calculations using select low drag precision bullets, the Hornady 4DOF® Ballistic Calculator provides trajectory solutions based on the projectile drag coefficient (not ballistic coefficient) along with the exact physical modeling of the projectile and its mass and aerodynamic properties. Additionally, it calculates the vertical shift a bullet experiences as it encounters a crosswind, referred to as aerodynamic jump. When paired with Kestrel’s environmental information, the result is extreme accuracy at long range with ultimate convenience in the field. Hunters and shooters can focus on their shot without fumbling with a smartphone or worrying about apps. HORNADY 4DOF BALLISTICS CALCULATORThe Hornady 4DOF Ballistics Calculator has been trusted by hundreds of thousands of long-range hunters and shooters since 2016. Ideal for precise long-range calculations using low-drag precision bullets, the Hornady 4DOF Ballistic Calculator provides trajectory solutions based on projectile Drag Coefficient (not ballistic coefficient) along with the exact physical modeling of the projectile and its mass and aerodynamic properties. Additionally, it calculates the vertical shift a bullet experiences as it encounters a crosswind; referred to as aerodynamic jump. The Hornady 4DOF also accurately calculates angled shots by accounting for important conditions. KEY FEATURES INCLUDE: Accurate measurements of wind speed and direction, temperature, altitude, and more. In addition to 4DOF, a G1/G7 Ballistics Solver with a large library of independently tested bullet data. Easy operation with large buttons and bright, clear backlit display. IP-67 waterproof, MIL-STD-810 drop-tested, and backed by a five-year warranty. Powered by one AA lithium battery for hundreds of hours of reliable use. Load-and-go convenience for calculating trajectories in areas without cell service. Kestrel LiNK Bluetooth AppsKESTREL LINK BALLISTICS FOR ANDROID - Download LinkKESTREL LINK BALLISTICS FOR APPLE iOS - Download Link Kestrel 5700 Ballistics Weather Meter with Hornady 4DOF & LiNK 0857HLSND