DESC: Every Chrony measures the speed of bullets, arrows, shotguns, airgun-pellets and paintballs, etc from 30/fps to 7000/fps and with better than 0.5% accuracy. A Chrony chronograph completes your reloading needs at an affordable price. It can go with you anywhere. Just unfold (like a book), mount on a tripod or place on a table, insert diffusers and shoot in less than 2 minutes. Every Chrony is made of 20 gauge steel but weighs less than 2.5 lbs. It is powered by one 9 Volt Alkaline battery (not included) and equipped with an extra large LCD readout (0.5" high). When folded, it is 7.5" long, 4.5" wide and 2.75" high. All Chronys come with a 5 year limited warranty, but will last a lifetime. Uses 9 Volt Alkaline Battery with 48 hours of continuous use. Velocity stays on display until you shoot again. Gives numbered shot velocities. Size / Style: F-1Mfg No: F-1Manufacturer: ChronyWeb site: www.shootingchrony.comWarranty: Five year limited warranty.Shipping InformationWeight: 4.1 pound