This coating thickness gauge adopts the principle of electromagnetic induction and magnetic induced EDD current. It can measure the thickness of non-metallic coatings on metallic. This unit is perfect for manufacturing company, metal machinery industry, chemical industry, and commodity inspection especially in automobile trade. Auto power off mode designed to extend battery life Zero, one-point and two-point calibration Digital LCD display Comes with iron base and non-iron base (made of aluminum) Portable, user-friendly and easy to carry even in pocket Compact design and easy to carry Provides Single, Continuous & Difference measurement mode with metric/imperial conversion Model No.: GM200 Feature: Measure the thickness of non-metallic coatings on metal Measuring Target: Thickness of non-metallic coating on metal Power Supply: 2 x 1.5V AAA batteries (without battery) Display Resolution: 0.01mm / 1mil Operating Temperature: 0 - 40 Celsius Operating Humidity: 10 - 95% RH Color: Yellow