Tachometer, RPM Accuracy +/-0.05 Percent, RPM Resolution 1 RPM, Maximum Contact RPM 99,999 RPM, Minimum Contact RPM 2.5 RPM, Maximum Non-Contact RPM 99,999 RPM, Minimum Non-Contact RPM 2.5 RPM, Maximum Non-Contact Distance 1 3/4 ft, Minimum Non-Contact Distance 2 in, Calibration Certificate Type Not Certified, Maximum Velocity Measured Not Applicable, Minimum Velocity Measured Not Applicable, Includes Carrying Case, Features Large Display, Digital Display Screen Type LCD