Looks like a decent set up cheaper Calipers.
While they are no Mitutoyo's they'll prolly get the job done for some at home engineering.
•An essential tool for accurate measurement with stainless steel casing and frame
•Extra-large LCD digital readout for exact internal and outside measurements accurate to .001-inch
•Instantly converts from SAE or Metric
•The display can be zeroed at any point on the slide.
•Machine-grooved thumb-roll mechanism and position lock for sure adjustment
•Hardened stainless steel shaft with depth-measurement probe, precision ground jaws
•On-off switch with auto-off
•Two batteries included (one extra).