Features:Brand new and high quality Thickness GaugeEasy to operate and use;Power supply by 1 piece 3V button cell, CR2032 or equivalent.( Move the battery's insulating piece away before using )Automatic calibration, Data hold. Mini size with LCD display.Two units available:mm/mil.Mainly used to non-destructively measure the paint thickness of car.Measuring range is 0.0 to 2.0mm or 0 to 80 mil.Operation:Probe:Before measurement, place the tester with its probe firmly against target surface;"TEST" button;Press "TEST" button to turn on the tester. Press and hold down this button for about 1 second to turn off the tester;Press "TEST" button to delete the reading on the display,the display will show "- -";"UNIT" button; Press this "UNIT" button to select desired unit: mm or mil;Specification:Measuring Range:0.0mm to 2.0mm0mil to 80milAccuracy : 2%rdg 0.1mm, or 2%rdg 4milNote: Accuracy is guaranteed at the operating temperature of 23and relative humidity of not more than 75%.Resolution : 0.1mm/1milPower Supply : 1 x 3V button cell, CR2032 or equivalent( Move the battery's insulating piece away before using )Operating Environment:Temperature: 0-40Relative Humidity: < 80%Temperature Coefficent:0.05x(2%rdg 0.01mm,or 2%rdg 4mil)/ (< 18 or >28 )Storage Environment:Temperature:-10 to 50 Relative Humidity:< 80%Size:6.9 x 3.8 x 2cmColor: Blue(EM2271)/Black(EM2271A)Package Include:1 x Paint Thickness Tester(Color random delivery)1 x English Manual