it's a portable electronic video borescope professional designed for the manufactueing and maintenance in automotive area. It is mainly used in diagnostic testing fray,coke,block of automotive engines, cylinder, fuel pipes,muffler,transmission systems,differential,water tanks,fuel tank,gearbox wear, ect. It greatly reduce the repair time and cost,while avoiding much mechanical damage caused by disassembly. It is aslo an excellent helper in cleaning and maintenance of automotive engine. A full color video camera ship is connected to the tip, and the image can be viewed on the color LCD monitor supplied. And it can be contacted into PC,monitor,television,portable player,and so on.