LCD Digital Display Thickness Gauge, Metric Micrometer, Wall Thickness Measuring Tools, 0-20 mm, Angled Style

3. Apply power to any part of the thickness gauge, and do not use a pen to engrave any markings, as this may damage the electronic circuit.
2. It must be kept clean to prevent water and other liquids from entering the thickness gauge, so as not to affect its normal use.
1. The thickness gauge is a precision measuring tool, and it must be protected from being struck or dropped during use to avoid loss of accuracy.
4. When not in use for an extended period, the battery should be removed.