Magnetospeed sporter barrel mount chronograph for rifles

Features:
-Simple, one-button cycling display (shows recent shot velocity & statistics, plug in to turn on)
-Battery: 9-Volt (included)
-Easy access battery compartment, no need for screwdriver to swap batteries
-Three sensitivity settings for fine-tuning
-Integral, quick-attach strapping system; with metal buckle & triad thumb nut
-Proven technology with updated sensor design
-Integral 3.5 foot sensor cord

Kit Includes:
-Display unit
-Bayonet-style sensor (Bayo)
-Thick & think rubber V-block spacers
-Heavy duty strap with thumb nut tightener
-Ultra-compact storage container

Other Features: Mounts on barrels.5"-1" dia.And muzzle devices up to 2.5" in length,compact led display, thick & thin v-block spacers, uses 1ea.9v battery, advanced data logging, mounts on barrel, three sensativity settings for fine tuning, for use with rifles only