[SMALL CAMERA WITH 5.5mm DIAMETER] The diameter of this USB endoscope camera head is only 5.5mm (0.2 inch), perfect for penetrating very small holes for inspection. 【STABLE CONNECTION】The USB endoscope is more stable and convenient than WiFi connection. Suitable for OTG Android 4.4+, MAC and Windows PC devices. 【6 ADJUSTABLE LEDS】6 adjustable LEDs on the camera tip, which greatly help to capture smooth videos and HD images in low light or darkness, even underwater.< br/>【16.4FT WATERPROOF HALF-SIDED CABLE】Armed a flexible cable that can easily control the direction of the inspection camera, bend it and keep its shape to access narrow spaces. Combined with the IP67 waterproof function, it can be widely used to inspect pipes, sewers, wall gaps, holes and cable ducts that have caused you trouble before.