Mini Portable Tachometer Noncontact Contact RPM Range 2 to 99 999 RPM Noncontact RPM Range 2 to 99 999 Speed (FPM) Not Applicable Speed (M/Min) Not Applicable RPM Accuracy +/-0.05 Percent Speed Accuracy +/-0.05 Percent of Reading + 1 Digit Working Distance 2 to 19.7 in Working Angle +/-30 Degrees RPM Resolution 0.1 RPM Light Source Laser Display 5 Digit Backlit LCD Memory Min/Max/Last