ProChrono Pal CEI-3900

This Chronograph measures velocities between 22 and 7000 feet per second, records 9 strings of fire with review of 99 shots each and computes statistics for each string (high, low, average, number of shots, standard deviation and extreme spread). Other features allow you to delete the current shot or string, and you can switch from standard to metric measurements. Chronograph includes plastic diffusers, 4 rods and is powered by a 9 volt battery (not included).