Endoscope-boroscope with screen. Indispensable device for engine diagnostics. If you need to assess the degree of wear of the cylinder-piston group, to see if the combustion chamber is not clogged, this thing will help you out. Stick this two-meter cable with a camera and LEDs on the end right into the spark plug well and you'll see the condition of the engine on a 4.3-inch color LCD screen. The camera has good sharpness so it produces a clear image even when 3cm away from the object, there is video and photo recording.