Now the computer not only performs multimedia to the fullest, but also keeps up with the times for the interaction of multimedia. Ha, cameras, microphones, video chats, interactive fun. A common 300,000-pixel camera costs only 30-80 yuan. The so-called clearer ones need to be watched carefully. There are no shortage of nonsense ones that pass off ordinary optical components as good ones, and the effect is quite different from the claims. There is also a relatively simple type, namely the so-called plug-and-play USB camera.