Caldwell Ballistic Precision ChronographThe Ballistic Precision Chronograph provides accurate velocity measurements across a wide range of shooting conditions. This Chrono has the ability to provide much better accuracy than other chronographs on the market (+ . 25%). Although technologically advanced, the unit is designed to be simple to operate, displaying velocity in Feet per second or Meters per second on the large built in LCD screen. The Chrono can also deliver the shot string