OH01A10 3.9mm ultra-miniature camera module has achieved a comprehensive breakthrough in performance. Compared with traditional endoscopes, its 3.9mm diameter is easier to penetrate narrow cavities than the mainstream 5mm model, the distortion rate is <-10%, and the dynamic focusing range of 10-100mm replaces the fixed focal length design. The unique F4 aperture + adjustable LED combination solves the problem of dark field imaging, and the USB2.0 universal interface avoids the additional cost of a dedicated acquisition card. For industrial quality control users, IP67 waterproof version is optional to cope with oil pollution environment; Healthcare practitioners benefit from the detachable disinfection design. These characteristics make it the preferred solution for upgrading in precision machinery maintenance, minimally invasive medical treatment and other scenarios.