Olympus 4 mm TrueView II telescopes have provided 115 ° wide-angle view, visual range joints can be observed in all parts. It is a great help to the doctor to judge the patient's injury. Using OLympus30°4K Arthroscope, the required wound area is small, the surgical safety is high, and the patient needs a short recovery period. Quick-lock connectors for security camera connections and fast telescope exchanges, they are also autoclavable for maximum durability.