Laser Tachometer, RPM Accuracy +/-0.05 Percent of Reading +1 Digit, RPM Resolution 0.1 RPM, Maximum Contact RPM 19,999 RPM, Minimum Contact RPM 0.5 RPM, Maximum Non-Contact RPM 99,999 RPM, Minimum Non-Contact RPM 2.5 RPM, Maximum Non-Contact Distance 1...