To be honest, I didn't expect it to be so good for its price. It is fully metallic and sturdy in feel, it comes in a hard plastic case.
Maximum measurement is 150mm. It obviously measures in inches as well. I measured a pipe with a diameter of 40mm and it indeed measured exactly 40mm. It doesn't work for precision measurements like 10.459mm, but it will display it as 10.46 rounded. It is excellent for general measurements. The scale measures with 0.05mm.