Feature: 1. Large Focal Length: Using a 3.9mm camera, the image resolution is up to 1920x1080P, and the focal length is 4‑6cm, and the imaging is clearer. 2. Engine Inspection: Can be used for carbon deposition detection in auto engines, observing the condition of the engine helps to extend the life of the engine. 3. Other Functions: Supports long pipe or sewer inspections. Semi rigid cables are not easy to break and deform, and it is easy to check hard to reach places. 4. IP67 Waterproof: Boresocope with 6 LEDs for clear visibility in dark environments. Waterproof design probes can detect wet or underwater places. 5. Wireless Connection: WiFi connection, high compatibility, mobile phones for Android and for iOS systems, convenient connection, easier observation. Specification: Item Type: Car Engine Endoscope.Material: ABSResolution: 1080P Lens Diameter: Approx. 3.9mm/0.15in Waterproof Rating: IP67 Focal Length: 4-6cm/1.57-2.36inBattery: Lithium polymer battery 18650(1800mAh) Package List: 1 x Car Engine Endoscope1 x Charging Cable1 x Manual