5.5mm DIAMETER TINY CAMERA The diameter of this USB endoscope camera head is only 5.5mm (0.2 inch), perfect to get into very small holes for inspection.^STABLE CONNECTION USB endoscope has more stable and convenient than wifi connection. Suitable for OTG Android 4.4+ Devices, MAC& Win PC.^6 ADJUSTABLE LEDS 6 adjustable LED lights on camera tip that greatly helps to acquiring the smooth video and HD image in dark or low-light condition, even underwater.^16.4FT WATERPROOF SEMI-RIDGED CABLE Armed with a Flexible cable that can control the inspection cameras direction easily, bend and keep it& 39;s shape to access confined spaces. Combined with the IP67 waterproof feature, it can be widely used for inspecting pipeline, sewer, wall crevice, hole, cable chute troubled you before.