Kestrel 5700 Ballistics Weather Meter with Hornady 4DOFThe Kestrel 5700 with Hornady 4DOF quickly and accurately determines long range holdovers and windage corrections to get you on target with first round hits. This all in one unit combines real time environmental measurements with the Hornady 4DOF ballistics calculator for a rugged, dependable, compact, and powerful long range shooting tool. No more DOPE cards, guessing at the wind, or being unsure where your bullet will hit when you change elevation.