Features1. Measure thickness of surface coatings on metal substrates 2. Single/continuous/differential measurement available 3. Zero-point/2-point/basic calibration available 4. Metric and imperial units of measurement optional 5. Powered by 2 x 1.5V AAA batteries (not included) 6. LCD backlight 7. Auto power offSpecifications1. Measuring range: 0 - 1.80mm (0 - 71.0 mil) 2. Resolution: 0.01mm/1mm 3. Measurement error: +-0.03mm 4. Lower diameter of substrate: 50mm 5. Lower thickness of substrate: 0.5mm 6. Operating temperature: 0 - 40 celsius degree 7. Operating humidity: 10% - 95% relative humiditySpecification: Package Weight One Package Weight 0.15kgs / 0.32lb One Package Size 20cm * 15cm * 6.5cm / 7.87inch * 5.91inch * 2.56inch Qty per Carton 40 Carton Weight 6.60kgs / 14.55lb Carton Size 62cm * 42cm * 34cm / 24.41inch * 16.54inch * 13.39inch Loading Container 20GP: 301 cartons * 40 pcs = 12040 pcs 40HQ: 699 cartons * 40 pcs = 27960 pcs