I am buying these items for our manufacturing facility so I am not an end user but if I don't hear anything I have to assume it is working as it should. Everything is good with this product.
Pros
Electronic display measures 0 to 0.5 inch (0 to 12.7 mm) with a resolution of 0.0005 inch (0.01 mm) and an accuracy of + or - 0.001 inch to measure short linear distances in engineering, machining and manufacturing. Applications