With the development of technology, mobile phones have become an indispensable product in people's lives. People's requirements for mobile phones are also getting higher and higher, and there are more and more types of mobile phone accessories, and USB dust covers are also one of them. The USB dust cover, as the name suggests, is to protect the earphone jack of the mobile phone and the charging hole from dust. Besides, how much do you know about USB dust covers? Here are some detailed introductions.