SHIMPO MT-200 Tachometers; Accuracy: 0.006 10.5 Digit (600.0 to 99999 RPM)%; 1 (6.0 to 599.9) RPM ; Minimum Measurement: 6.00 RPM ; Maximum Measurement: 99999.00 RPM ; Minimum Resolution: 1.0000 RPM ; Maximum Resolution: 25000.0000 RPM ; Batteries In