Features:-Three-button menu system-Battery options: (1) 9-Volt or (2) CR123s-Easy access battery compartment, no need for screwdriver to swap batteries-Improved shooting modes, with the ability to now operate with air guns-Downloadable firmware updates-Advanced data logging & troubleshooting capabilities-More compact & rugged display housing-Rapid mode with rate-of-fire-Redesigned bayonet-Rugged strapping system-Dual data connection pointsKit Includes:-Display unit-Retractable connection cable & Standard 6 ft. connection cable-Stainless steel blast shield-Thick & thin rubber V-block spacers-microSD card with adapter-Bayonet sensor-Polymer spacer kit with screw hardware & allen wrench-Heavy duty strap with thumb nut tightener-Hard case with custom cut foam-Alignment rod-InstructionsPRODUCT SPECIFICATIONS:Dimension 3.60 X 10.50 X 14.10Height 3.6000Width 10.5000Length 14.1000TYPE/COLOR BALLISTIC CHRONOGRAPHSIZE/FINISH BARREL MOUNTEDMATERIAL POLYMEROTHER FEATURES: MOUNTS ON B ARRELS .5"-2" DIA. & MUZZLE DEVICES UP TO 3.5" IN LENGTH, MICRO SD CARD, BLAST SHIELD, DUAL DATA PORTS, CABLES, ADVANCED DATA LOGGING, THICK & THIN V-BLOCK SPACERS, ALIGNMENT ROD, DOWNLOADABLE FIRMWARE UPDATES, HARD CASE, USES 1EA. 9V OR 2EA. CR123