Professional range of hand held tachometers from Trumeter. This tachometer kit is straight forward to use, push the measurement button to record the speed. It also utilises state-of-the-art technology and can be used for non-contact or contact measurement on rotating machinery or surface speed. These hand held tachometers can indicate RPM or length measurement, rotational speed, meters, yards or feet per minute. All models are highly reliable and excellent quality.Best Accuracy = ±0.01% + 1 DigitCategory = Contact, Non ContactBattery Type = 9VDimensions = 29 x 49 x 147mmWeight = 95gHeight = 147mmLength = 29mmMaximum Operating Temperature = +50°CMaximum Speed = 99999rpmMinimum Operating Temperature = 0°C