Item Type: Paint Thickness Gauge_x000D_ Model: HW 300PRO_x000D_ Material: ABS_x000D_ Measuring Range: 0-2000um_x000D_ Measurement Accuracy: (3%1um)_x000D_ Resolution: 0um~999um (1um)_x000D_ 0 Calibration: Supports_x000D_ Statistics: Average, Minimum, Maximum, Number_x000D_ Minimum Convex Arc: Approx. 5mm / 0.2in_x000D_ Minimum Concave Arc: Approx. 25mm / 0.98in_x000D_ Minimum Measuring Area Diameter: Approx. 20mm / 0.79in_x000D_ Magnetic Induction: Measuring principle on F probe, eddy current effect on N probe. _x000D_ Minimum Substrate Thickness: 0.2mm for F probe, 0.05mm for N probe. _x000D_ Maximum Measurement Speed: 2 readings per second. _x000D_ Power Supply: 2 x 1.5v AAA battery, delivered without battery. _x000D_ Operating Environment:_x000D_ Temperature: 0~50 20-90% relative humidity, non condensing. _x000D_ Humidity: -10~60 20~90% relative humidity, non condensing.