Digital Calipher Vernier (to 2-decimal point) - for verifying string thickness

Finally managed to obtain a reasonable cost digital calipher vernier which was accurate to 2-decimal points. Purchased it during the Black Friday sales.

As per received

The LR44 battery was pre-loaded.  Now to test for accuracy and if it was functional:-

1. Switch it on and set units to millimeter.

2. Slide the jaws to the minimum gently and press the ZERO button to calibrate it accordingly.

3. Next I slide the caliper jaws open until the display showed 5.00mm - not as easy as it seems due to the 2-decimal point accuracy.

4. Then I place it next to a ruler for comparison - ruler in centimeters (but was placed up-side down😒)

Works as advertised!

As such I was not going to return it 👍👍👍

Close-up of the ruler and caliper jaws