Check velocity of arrows paintball gun favorite hunting rifle or pistol load. Self contained carry case. Detachable keypad display w/20' cord allows editing string & not having to use binoculars to see velocity. Display shows last velocities recorded. Memory stores 100 velocities in 10 strings of 10 shots each. Edit function allows deletetion of shot(s) & displays the following functions: average velocity high low extreme spread & standard deviation. Velocity range: 50- 7000 fps & meters per second. Operates on one 9 VDC battery (not included). Standard camera tripod mounting. Optional diffusers & supports store neatly into housing. RCBS one year warranty.