Xcortech X3200 MKIII ChronographMeasures muzzle velocity from 30 m s ~ 400+ m s (90 fps ~ 1200+ fps) Calculates muzzle kinetic energy from 0. 01~999 joule High quality DOT Matrix backlit LCD display External micro USB power input Enlarged shooting tube (38mm) to easily line up your gun High density IR detector for fired projectiles Six memory options for saving various ammo weight and calibers Shot memory log of velocity & rate of fire Calculate min max, E S (extreme spread), AVG, S