Used together with an image processing system for intracavitary observation and diagnosis of the upper urinary tract (urethra, bladder, ureter, renal pelvis and calyces). It can be used with laser fibers, stone retrieval baskets and other instruments for lithotripsy and stone extraction of renal and ureteral calculi, as well as examination of upper urinary tract lesions. The tip can deflect at a large angle to access all renal calyces. Single‑use, no sterilization required, reduces cross‑infection risk of reusable endoscopes and ready for immediate use.