The V3 Chronograph attaches to a weapon’s muzzle like a bayonet, and provides bullet velocity data as well as other information useful for improving accuracy. The V3 Chronograph features several upgrades over its predecessor, the V2. These improvements include a thinner sensor deck for optimized performance and an anodized aluminum frame under the V-Block makes the sensor stronger and provides possible alternative mounting positions. The V3 bayonet sensor also features a second data connection point that faces downward for easier mounting on weapons with shorter barrels and longer handguards, and a metal cam buckle makes strap adjustment and release fast and straightforward. The V3 Chronograph also utilizes an upgraded display, featuring a smaller, balanced design that sits at a comfortable angle. The display also sports an easy to use 3-button interface, can receive updates via micro SD card, and can run on either a single 9-volt battery or two CR123 batteries. In addition to projectile speed, the V3 Chronograph provides your Standard Deviation, and has modes optimized for shotguns, air guns, and rapid-fire mode that provides your average rounds per minute. It comes as a kit that includes: Display unitRetractable connection cable6’ connection cableStainless steel blast shieldThick and thin rubber V-Block spacers MicroSD card with adapterBayonet sensorPolymer spacer kit with screw hardware + allen wrenchStrap with thumb nut tightenerAlignment rodAll of which comes in a protective hard case with a custom foam cut out. MagnetoSpeed V3 Chronograph Kit