Function: 1. Convenience: This is a highly accurate and compact instrument for quick and accurate measurement of coating or plating thickness on all kinds of metal surfaces. It can be calculated automatically by placing it only on the test surface. 2. Accuracy: Zero calibration In order to improve the accuracy of the test, it is recommended to calibrate the instrument to zero. Press and hold until you hear a drip and zero calibration flashes on the screen. 3. Easy to operate: the probe is placed vertically and quickly on the surface of the uncoated substrate to be tested. After hearing the dripping sound, an O will appear on the screen and the probe can be raised at least 2 cm from the ground, which is back to zero once. 4. Powerful: Measures paint thickness, but more importantly, this paint thickness tester can detect issues you may not be able to see with the naked eye. 5. Widely used: this device can be used to determine the average thickness of paint on the car body, used in manufacturing, metal processing, chemical industry, commodity inspection, laboratories, workshops. Specification: Item Type: Coating Thickness Gauge Material: ABS Weight : approx. 107g / 3.8oz Product Size: Approx. 12.2 x 5 x 2.2 cm / 4.8 x 2.0 x 0.9 in Measuring range: 0-2000UM Measurement Accuracy: (3% 1UM) Battery type: 2 x AAA (supplied without batteries) Package List: 1 x coating thickness gauge 7 x calibration plate 1 x English manual