Chrony Gamma MSTR withPRNTR - Every SHOOTING CHRONY(R) is made of 20 gauge steel but weighs less than 2 1/2 pounds. It is powered by one 9 Volt alkaline battery (not included) and equipped with a large LCD-readout, 0.5" high. When folded, a SHOOTING CHRONY(R) measures 71/2" long, 4 1/2" wide, and 2 3/4" high. Every SHOOTING CHRONY(R) comes with an adjustable size, triangular shooting area from 8" 8" to 14.5" 14.5". The sides of the triangular shooting areas are made of wire-rods; the top of the triangle is formed by a 2 1/4" wide strip of tough, Hi-density polyethylene plastic, 1/8" thick. All shooting is done through the center of this triangular area, along the axis of the chronograph. Some SHOOTING CHRONY(R) seen on this Web-site may be shown either with the smaller shooting area or with the larger shooting area. Ballistic Chrony Printer. (See Ballistic Chrony Printer) Will also print Timer-Data A Demo of Chrony Ballistic I Software 500 shot memory (divided into 50 numbered strings of 2 to 10 shots each) Memory for 500 individual Timer Read-Outs Timer Button The Gamma (at all times) measures and stores not only shot velocities but also time-elapsed between shots, including total timeTo make the Timer-Data visible, press the Timer ButtonWhen in Timer-Mode the Chrony will also measure velocities at a rate of up to 1800 rounds/minute as well as the time elapsed betSilver Green