Laser Tachometer Noncontact Noncontact RPM Range 2 to 99 999 RPM Accuracy +/-0.05 Percent Working Distance 1.6 ft Working Angle +/-45 Degrees RPM Resolution 0.100 Light Source Laser Display 5 Digit LCD Memory Last/Min/Max Features Last Reading Hold Min/Max Indicator On Target Standards Class 2 Laser Calibration Certificate Available Separately Includes 24 in (600mm) Reflective Tape 9V Battery Instructions