Measure the velocities for your rifle/pistol bullets, arrows, shotguns and pellet guns at a price anyone can afford. ProChrono Digital Plus features an expanded shooting area that's nearly two times the size of comparably priced models. Measures velocities from 22 to 7000 feet per second and runs on a single 9-volt battery. Shoot in all weather. This chronograph operates in temperatures as low as 32 and as high as 100 Fahrenheit. Has all of the features you'd expect in a chronograph costing much more. Allows you to review 50 shots with power-down memory (review at home), high and low velocity settings, standard deviation, number of shots, average velocity, and deletes current velocity. Shows metric or FPS scales and features durable plastic diffusers. Measures just 16" x 3-1/4". Mounting hole thread measures 1/4" x 20".