Digital Touch IndicatorThis digital touch switch indicator is used to accurately measure small linear distances in mechanical and industrial processes without reading errors. In the inspection process of machine parts, this tool helps to check the tolerance level and is an ideal tool for machinists, industrialists and laboratories.0 - 12.7 mm Measuring RangeThe measuring range is 0 to 12.7 mm (0 to 0.5 inch), and the high resolution is up to 0.01 mm (0.0005 inch). Touch button, sensitive touch function, just press the button to switch between metric and inch, switch and zero.USB ChargingWith charging function, built-in rechargeable lithium battery, it can be used normally for 3 months after charging. The red light indicates that it is charging, and the green light indicates that charging is complete.IP54 WaterproofIt can be waterproof, dustproof and oilproof, but it cannot be used in water or oil. If there is liquid on the surface, wipe it off in time. Removable ProbeSuitable for various M2.5 side probes, easy to use. Has good wear and rust resistance. The screws are detachable and can be replaced with other sizes. Hole diameter: 6.5mm (back cover), movable, can be used for different magnetic base mounts.