0.21-Inch Diameter Camera & Semi-rigid Cable Endoscope: The USB Endoscope camera probe is ultra-thin, only 0.21 inch/5.5mm, we can use this Endoscope in many hard-to-reach, narrow, and confined places at home or outdoors, such as HVAC, vent pipe, engines, air conditioners, sofa corners, bathtub pipes, toilets, etc. Unlike similar USB borescopes with soft cables, this one comes with a semi-rigid cable that can be forwarded to the narrower place more easily.

【See More with Dual Lens&Split Screen】: The DS300 inspection camera has dual-lens technology that allows you to switch between different viewing angles without installing a side mirror. The FOV 70° button give you a wider viewing angle even in a narrow place; with one button, you can switch between three observation modes for more convenience and ease of use.

【 Advanced 5.5mm Camera 】--- The head of the digital endoscope camera is 5.5mm diameter which enables it to reach smaller pipes and areas where those old version 8.5mm borescopes can't fit.