USB is short for Universal Serial BUS. Its Chinese is referred to as "through-train line", It is the standard of external bus which is used to regulate the connecting and communicating of computers and external devices. It was applied in the field of PC Interface technology. USB interface supports plug and play as well as hot swap function of devices. USB is jointly proposed by Intel, Compaq, IBM, Microsoft and other companies in the end of 1994. The Purposes of developing USB Universal Serial Bus product is to integrate many existing PC I / O ports into the band etc. that is applicable to a variety of models for different applications. "A" series connectors can be directly inserted into the downstream outlet port of USB host or hub. The series of standard "B" connectors, with basic square shape and a chamfer, can be inserted into the upstream outlet of USB device or hub. This series includes two models of vertical and right angle socket. vertical models. Fleconn can customize all kinds of USB Cable for global customers