Combination Tachometer with NIST Noncontact Contact RPM Range 2 to 20 000 RPM Noncontact RPM Range 2 to 20 000 Speed (FPM) 0 to 6560.8 fpm Speed (M/Min) 0 to 2000 m/min RPM Accuracy 0.05 Percent of Reading Speed Accuracy +/-0.05 Percent of Reading + 1 Digit Working Distance 8.2 ft Working Angle +/-30 Degrees RPM Resolution 0.1 RPM Light Source Laser Display 5 Digit Backlit LCD Memory Min/Max/Avg