Digital Stroboscope Kit, Includes 115/230V Charger, Carrying Case, Instructions, Spare Lamp, Resolution 0.01 fpm, Digital Display Screen Type LCD, Maximum Flashes per Minute 20,000 fpm, Minimum Flashes per Minute 30 fpm, Maximum Flash Duration 20 usec, Power Source Battery, Calibration Certificate Type NIST, Phase Shift Internal, Minimum Flash Duration 8 usec, External Triggers Input/Output, Body Style Full Size, Battery Run Time 2 hr, Accuracy +/-0.004 Percent, Manufacturer Warranty Length 1 yr