Gives numbered shot velocities. Velocity stays on display until you shoot again. Uses one 9V battery. 500 shot memory (divided into 6 numbered strings from 2 to 10 shots each, with statistics for each). Measures high, low and average velocities as well as extreme spread and standard deviations. Retrieval of individual shot velocity measurements. Delete individual shots from memory (with automatic adjustment of statistics). Timer button. Includes remote control with close up read out and 18 ft cord. Can be switched off for later reviewing of information or downloading onto computer. Includes Ballistics Chrony Printer and a demo of the Chrony Ballistics I software. The Gamma (at all times) measures and stores not only shot velocity but also time elapsed between shots, including total time.