- 20mm measuring aperture can test objects with surface stripe accurately. Vertical structure can test wet surface object or can be soaked into the liquid for testing. - Double Locating: Illuminating locating and cross locating. Adopting new optical path and dynamic integration time can test more stable and accurate. - 45°/0° optical geometry structure, considering the effects of surface features Annular illumination design, suitable for polarizing material. - Equipped with rechargeable high-capacity Li-ion battery. No need to purchase battery repeatedly. - Configuring CQCS3 software -- connect PC computer to realize more functions.