Feature:1. Smart Testing: Can record the average, maximum and minimum value and difference value at the same time, and supports up to 50 data for statistics, accurate and convenient. If the auto power off function is on, the instrument will automatically shut down to save battery power without any operation within 3 minutes.2. Coating Meter: Used to measure the thickness of non conductive coatings on metal surfaces, as well as the thickness of non ferromagnetic coatings on ferromagnetic metals.3. Simple in Use: There are 3 units of um, mm, mils, which can be set by a button, and can quickly measure the thickness of plating on metal surfaces.4. Broad Utility: Widely used in automotive factories, industrial manufacturing, production equipment, mechanical processing, etc.5. Better Design: High definition display with background light, easy to read data, non slip design, comfortable to hold, only 4.72 inches long, easy to carry.Specification:Item Type: Paint Thickness GaugeModel: HW-300SMaterial: ABSResolution: 0.01mm or 1milMeasuring Range: 0-2000UMMeasurement Accuracy: 3 percent and1UMResolution: 0um-99.9um, 0.1um. Minimum Convex Arc: Approx. 5mm or 0.2inMinimum Concave Arc: Approx. 25mm or 0.98inMinimum Measuring Area Diameter: Approx. 20mm or 0.79inMinimum Substrate Thickness: Approx. 0.2mm or 0.01inMaximum Measurement Speed: 2 readings per second. Power Supply: 2 x 1.5V AAA battery, delivered without battery. .Package List:1 x Paint Thickness Gauge6 x Standard Film1 x Basal Plate1 x User Manual