The advanced tracking radar inside Labradars Chronograph captures and records the exact velocity of shots from your pistol, rifle, shotgun, bow and crossbow. Records speeds from 65 fps to 3,900 fps with 0.1% accuracy. Can track your shot to capture velocities at up to five additional distances, displaying kinetic energy at each distance. Maximum tracking distance of 100 yds., depending on the size of the object. Its internal computer records up to 100 shots per series and up to 9,999 series. The 3.5 display reports in metric or standard velocities and distances. Each shot series displays high, low, average, ES and SD data. Built-in IPSC/IDPA power factor calculator. Bluetooth campatible app for IOS and Android devices. USB and SD-card slot allows for data transfers to your PC. Battery-status indicator. Runs on six AA batteries (not included). Type: Chronographs.