Messbereich: 20 fps/s bis 9999 fps/s (23 km/h bis 10998 km/h) Internal and external refinements with updates to the circuitry and enclosure design Built in full featured operating system with multiple shot string memory and statistics Sensing system compatible with a wide variety of light conditions and projectiles Faster internal shot clock for improved accuracy to +/- .5% or better Made in the USA quality at an affordable price Two year warrantee against defects in material and workmanship, and a 1/2 price repair guarantee Over 30 years of experience in chronograph design and manufacturing Replaceable Alkaline 9 volt battery power (not included) for 20+ hours of operation Quality accessories and replacement parts at a reasonable price Made in USA with real service and support Specification: Velocity Range: 20 – 9,999 feet per second Temperature Range: 20-100 degrees Fahrenheit Size: 16" x 4" x 3-1/4" Weight: 2.1 lbs. Battery Required: One 9-volt alkaline battery Battery Life: Approx. 20 hours of operation Current Consumption: Approx. 15mA Tripod Mounting Hole Thread Size: 1/4" - 20 Guide Wire Size: 3/16" x 16" Memory Capacity: Up to 9 strings of up to 99 shots each Review Statistics Capability: Individual shot velocities, High, Low, Average, Extreme Spread, and Standard Deviation Minimum Time Between Shots: 500 mSec Shot Timing Resolution: 31 nSec (8000 counts @ 4,000fps) Crystal Controlled Accuracy: +/-.5% of measured velocity or better