The thickness gauge body is made of high quality engineering plastics, lightweight and durable It is designed with a large digital LCD display for convenient data reading Supports reset function at any position, metric and imperial system switch, manual power on/off and automatic power off Suitable for measuring situations requiring special insulation and magnetic or anti-scratch protection Can be used to measure the thickness of paper, PU leather, metal sheets, jewelry, battery, magnetic materials, etc. Features: This thickness gauge has a large digital LCD display for convenient data reading. The main body is made of high quality engineering plastics, lightweight and durable. It has a shape similar to the micrometer, and the function is also similar to the micrometer, mainly used to measure the outer diameter of the tube or rod and the measuring thickness. Instruction: 1. Press the on/off button to turn on. 2. Check if it displays 0.00, if not, reset it by pressing the ZERO button. 3. Press the pressing bulge and put the coin inside then release the bulge. Read the measurement result and measure a few more times then calculate the average of the results to get a more accurate one. Specifications: Measuring Range: 0-12.7mm / 0.5inch Resolution: 0.01mm, 0.0005inch Accuracy: 0.1mm, 0.005inch Operating Temperature: 0~40 Storage Temperature: -20~70 Relative Humidity: 80% Power Supply: LR44 Button Battery Size: 106 x 38 x 22mm Color: Blue Package: 1 x Thickness Gauge