Competition Electronics Prochrono Digital Chronograph and Purchasecorner Polish Cloth Bundle
Velocity Range: 21-7,000 feet per secondTemperature Range: 32-100 degrees FahrenheitSize: 16 x 4 x 3-1/4 inchesBattery Required: One 9-volt alkaline battery (not included)Mounting Hole Thread: 1/4 x 20Guide Wire Size: 3/16 x 16 inchesMemory Capacity: Up to 9 strings of up to 99 shots eachMinimum Time Between Shots: Between 250 mSec and 500 mSecShot Timing Resolution: 750 nSec Crystal ControlledAccuracy: +/-1% of measured velocity, or betterCurrent Consumption: Approx. 15mA