1Used to measure the coating or coating thickness of various metal surfaces, with fast measurement speed and high accuracy 2Automatic identification of iron and aluminum substrates, rapid response, making measurement easier 3The Digital LCD display displays clearly, which is convenient for users to observe the readings, Improve work efficiency 4Automatic shutdown function, it will automatically shut down after a period of inactivity, saving power 5Made of ABS, steel and PTFE, wear and corrosion resistance, with high accuracy in all weather conditions Item Type:ThicknessGauge Model: GM998 Material: ABS+steel+PTFE Battery: 2 x 1.5V AAA(battery not included) Probe F Probe N Principle Magnetic Induction Eddy Current Range 0~1500um 0~1500um 0~59.1mil 0~59.1mil Accuracy (3%+2um) 3%+2um) (3%+0.08mil) 3%+0.08mil) Resolution 0.1um/0.01mil 0.1um/0.01mil Calibration Zero/Multipoint Unit um,mil Minimum curvature radius convex 1.5mm / 0.06in Minimum curvature radius concave 25mm / 0.98in Minimum Measurement Area Diameter 6mm / 0.24in Minimum Thickness of Substrate 0.5mm(0.02in) 0.3mm(0.012in) Working Environment Temperature: 0~40(32~104) Humidity: 20%~90%RH1 x ThicknessGauge(battery not included) 1 x Manual (English) 1 x Manual (Russian) 1 x Iron Sheet 1 x Aluminum Sheet 5 x Plastic Sheet 1 x Carrying Case