This digital laser tach; comes with a certificate of calibration; can read 5 ft from the reflector; reads from 6 to 99,999 rpm; has a measuring accuracy of +/-0.006%; has several memory functions; updates the reading each second; & has many other features. It is the ultimate non-contact type of tachometer. The reading seen in the picture is the result of pointing the tach at a neon bulb.
