Digital Stroboscope, Includes 3 Pin Female M16 Threaded Connector, AC Power Adapter, Top and Bottom Handles, Resolution 0.1 fpm (60 to 6,000 fpm), 1 fpm (6,001 to 12,000 fpm), Digital Display Screen Type LED, Maximum Flashes per Minute 12,000 fpm, Minimum Flashes per Minute 60 fpm, Maximum Flash Duration 30 usec, Power Source Battery, Calibration Certificate Type Not Certified, Phase Shift Internal, Minimum Flash Duration 10 usec, External Triggers Input/Output, Body Style Full Size