There are three kinds of USB Interfaces,which respectively are standard Type-A USB interfaces, Type-B USB Interface and Type-C USBType-A interface is what we usually use and the most standard USB interface just as the wholesale 1-Piece Fixing Ties for Weld Studs name suggests,which indicates that it is a standard USB interface, while other USB interfaces are its derivatives.As for Type-B USB interface, you surely are not unfamiliar to it despite it is not quite frequently asked, printers, monitors and many other USB HUB external USB devices use a Type-B USB interface. In general, Type-A is applicable for PC host USB interfaces, and Type-B is compatible with the external device.Given the Type-C or USB-C interface,it is smaller than both Type-A and Type-B, and its size is even comparable with the Mini-USB and Micro-USB , which is the latest USB interface. Known as pretty slim design, faster transfer speeds (up to 10Gbps) and a more powerful power transmission (up to 100W),USB-C unique double-sided pluggable interfaces,you would never worried about how to quickly plug the USB any more, just casually plug it regardless of positive and negative random. Additionally, the supporting USB cable must be finer and lighter,USB-C can be used in both a PC host and an external device (slave), which is a high tech peripheral connection,that's such a great invention and why it is superior to other USB cable.1. SlimThinner body needs thinner port, that is why Typ-C USB interface was turned out.USB-C port length is 0.83 cm and wide is 0.26 cm. Vintage USB port with 1.4 cm long, 0.65 cm wide has been obsolete. Meanwhile,the end of the USB-C data lines will be one-third of a standard USB-A type cable plug size.2. No pros and consJust like Lightning interfaces, USB cable's both ends will be the same, allowing for reversible plug orientation. You also don't need to worry about plugging it in upside down.3. FastTheoretically, the maximum transfer rate of Typ-C port is 10Gb per second. But Apple said the maximum transfer rate of new MacBook's Typ-C port is 5Gbps. The maximum output voltage is 20 volts,which can speed up the charging time.While the max transmission rate of USB-A type is 5Gbps, the output voltage is 5 volts.4. rounderThe new MacBook's Typ-C-type ports can transfer data, it can also be charged and as a video output port link to an external display device. The only question is how to meet the requirements simultaneously.5. BidirectionalUnlike the older USB port with only one-way power transmission, Typ-C port with bidirectional power transmission have two way transmission power. Therefore, the user can not only charge the mobile device with a laptop, but can use other devices or mobile power to charge notebook. [3]6. backward compatibilityTyp-C USB interface can be compatible with older USB standard, but users need to purchase additional adapters to complete compatibility. Apple said the third-party companies can also authorized production in addition to the official Apple adapter.7.SpecificationsThe type-C USB interface standard is authorized to manufactured by Apple, Intel, Google, Microsoft, sophisticated telecommunications legislation and other international companies.For more information about the Type-C USB interface,please visit