Combination Tachometer, RPM Accuracy +/- 0.05 Percent, RPM Resolution 0.1 RPM, Maximum Contact RPM Not Applicable, Minimum Contact RPM Not Applicable, Maximum Non-Contact RPM 99, 999 RPM, Minimum Non-Contact RPM 2 RPM, Maximum Non-Contact Distance 1 5/8 ft, Minimum Non-Contact Distance 1 5/8 ft, Calibration Certificate Type Available Separately, Maximum Velocity Measured Not Applicable, Minimum Velocity Measured Not Applicable, Includes Carrying Case, Reflective Tape