This digital contact tachometer is used to detect rotational speed, linear speed or motor frequency. It can be widely used in motors, fans, washing machines, automobiles, aircraft and other industries. resolution.LCD display for clear indication.Max./Min./LAST value measurement.Equipped with the linear channel rate sensor, it is easy to measure the linear rate wire, cable, etc. .Convertible accessories for different measurements.Includes low battery indication and automatic shut-off function.Comes with protective bag for easy storage.Specifications: Brand Name: SMART SENSORColor: Black + YellowMaterial: ABSDisplay: Backlit LCD*Measurement Range: 0 .5~19999RPM0.05~1999.9m/min0.2~6560ft/min*Resolution: 0.1RPM (0.5~999.9RPM) / 1RPM (above 1000RPM)0.01m/min (0.05~99.9m/min) / 0.1m/min (above 100m/min)0.1ft/min (0.1~999.9ft /min) / 1ft/min (above 1000ft/min) Accuracy: (0.05%+1dgt) Sampling Time: 0.8s (over 60 rpm) />Power consumption: approx. 30mAPower supply: 3 x 1.5V AAA batteries (not included)Operating environment: 0~50C / 32~122FStorage environment: -10~ 60C / -14~140FItem size: approx. 17 * 5.6 * 3.5cm / 6.7 * 2.2 * 1.4inch Item Weight: Approx. 125g / 4.4ozPackage size: approx. 20.5 * 11.1 * 6cm / 8.1 * 4.4 * 2.4inPackage weight: approx. 230g / 8.1ozPackage List:1 * Digital Tachometer5 * Rubber Tips1 * Protective Bag1 * User Manual ( English)