the handle at the top of the thickness gauge, put in the measured object, and release the handle to measure the thickness of the goods (PS: effective range 0-12.7MM). It is suitable for jewelry measurement, film measurement, hardware measurement, paper measurement, wire measurement and cloth measurement. The battery part is tightly designed to block the battery, and the battery not -up easily after repeated tests, which is convenient for replacement. The plastic material can better protect the article from being scratched or dented when measuring the article, and play a role of light weight and firmness. the ZERO button to reset at any position in the measurement process, which is convenient for relative value and absolute value measurement and data recording. Ultra-large LCD display, clear data display, accurate and fast degree, and automatically turn off when not in use for next use. Name:Precision Electronic Thickness Gauge Battery specification:LR44 (product with battery) Colour:Blue & Black Material:Plastic Package Contents: 1 * Precision electronic thickness gauge Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.