The display is ok, the thunb wheel is loose and does not slide easily, the slide operation is steel on steel, it should have a brass or copper strip to give a smooth operation. It's steel on steel which means it's difficult to operate with one hand.
I will not buy any of these again, they are probably worth €3.00.

The digital display, I don't know how accurate it is. The knob that moves it is completely loose, resulting in moving it by touching it from above the digital frame.

I have 3 electronic calipers that cost 20-30€ each, we ordered this one as a spare hoping for similar quality. The electronic mechanism is as good as the others, but its metal part reminds me more of something you bought from a bazaar for 1-2€ and not a precision mechanism that came from a serious production line. However, I put its electronic part in another caliper (by unscrewing the 4 screws it has underneath) and it works perfectly.