Check the listing for details. Competition Electronics Pro Chronograph ProChrono LTD Ballistic LTD 3825. Color: Gray, Condition: New. Listed at 179.99 USD. DESCRIPTION ProChrono LTD Ballistic Chronograph is great for firearms, shotguns, archery, airguns, and paintball. A chronograph lets you measure the speed that the bullet leaves the barrel. Everything is included for outdoor use. For indoor use, purchase the optional Indoor Lighting System (part# CEI-4100). Requires one 9 volt alkaline battery for operation (not included). Internal and external refinements with updates to the circuitry and enclosure designBuilt in full featured operating system with multiple shot string memory and statisticsSensing system compatible with a wide variety of light conditions and projectilesFaster internal shot clock for improved accuracy to +/- .5% or betterMade in the USA quality at an affordable priceTwo year warrantee against defects in material and workmanship, and a 1/2 price repair guaranteeOver 30 years of experience in chronograph design and manufacturingReplaceable Alkaline 9 volt battery power (not included) for 20+ hours of operationQuality accessories and replacement parts at a reasonable price Made in USA with real service and support