Ideal for applications where a contact tachometer would be unsafe to use or will not reach. Just apply some of the supplied reflective material to the moving part and point the laser tachometer at it. The tachometer measures how often the reflective tape passes at a given time and calculates the rpm. Applications: It is applicable to the production departments of motor, fan, paper-product, plastics, chemical fiber, washing-machine, automobile, airplane, steam, etc. Features: 1.Mine Handheld Gun Type Design 2.Wide Range of Measurement and High Resolution 3.Automatic & Manual Measurement Functions 4.Data Record and Recall (60 Readings Max) 5.Max/Min/Avg Value Record Function 6.Record Time Interval Setup Function 7.LCD with White Backlight 8.Data Hold Function 9.Auto & Manual Power Off 10.Low Batter Indication 11.CE & RoHS Compliant 12.Ideal for applications where a contact tachometer would be unsafe to use or will not reach. 13.Just apply some of the supplied reflective material to the moving part and point the tachometer at it. 14.The tachometer measures how often the reflective tape passes in a given time and calculates the rpm. Specifications: 1.Measuring Range: 2.5 - 99999 RPM 2.Resolution: 0.1 RPM at 2.5-999.9RPM / 1 RPM at 1000 - 99,999 RPM 3.Accuracy: ±0.02% + 1 Digit 4.Measuring Distance: 50 - 500mm 5.Sample Time: 0.5s (above 120 RPM) 6.Operational Temperature: 0 to 50 Deg. C (32 to 122 Deg. F) 7.Operation Humidity: 10 to 90%RH 8.Storage Temperature: -10 to 60 Deg. C (14 to 140 Deg. F) 9.Storage Humidity: 10 to 75% RH 10.Dimensions: 145*90*35mm 11.Powered: via 9V Battery - (Not included) Package Content: 1x Laser Photo Tachometer 1x Marker Band 1x User Manual (English)