This coating thickness gauge adapts principles of electromagnetic induction and magnetic induced EDD current. It can measure the thickness of non-metal coatings on metal surface. Press the button to select magnetic metal or non-magnetic metal. It is an ideal instrument in manufacture, metal machine industry, chemical industry and commodity inspection, especially in automobile trading. Features: Measuring range is 0~1.25mm nonmetal coating on metal surface. Mm/mil two units available and switchable. LCD digital display and data hold for easy and clear reading. It will automatically power off in 1 min without any operation. Press ON button to power on, then press Fe/NFE to choose the metal type and finally press Zero for unit. Fe means magnetic metal panel while NFE stands for non-magnetic metal panel. It has the advantages of easy operation, rapid measurement, safe usage and portability. Instructions for Use: Press and turn on the tester to start measuring. The thickness of the coating on the metal surface will be displayed on the LCD screen. Quickly remove it from the tested surface. The measured value will be saved on the LCD screen. Specification: Condition: 100% Brand New Material: ABS Color: Shown as Picture Measure Target: Non-metal coating thickness on the metal surface Measuring Ability: 0~1.25mm nonmetal coating on metal surface Measuring Precision: 2%RDG±0.02mm(2%RDG±1mil)(steel and aluminum only) Power Supply: 1 * 3V CR2032 Battery(not included) Operating Current: ＜10mA Auto Power Off Time: No actions in 1 min if have the measured object Minimum Diameter of Base: 10mm Critical Thickness of Base: 0.5mm Display Resolution: 0.02mm/1mil Operation Temperature: -5℃~+40℃ Working Humidity: 5%~95%RH non-condensing Storage Environment: -20℃~60℃, ＜85%RH(w/o battery) Size: Approx. 8*4*2cm/3.15*1.57*0.79in Weight: Approx.103g/3.6oz Package List: 1 * Paint Thickness Tester(Battery not included) 1 * Pack of Small Accessories .