The USB socket interface is a Universal Serial Bus (USB) interface used for connecting and transmitting data. It is commonly used to connect computers, electronic devices, and external peripherals such as printers, cameras, keyboards, and mice.

The USB socket interface typically has a rectangular shape with four or more metal contacts for data transmission and power supply. USB socket interfaces are generally categorized into two types: Type-A and Type-B.

The Type-A interface is the most common USB socket interface, used for connecting computers to external devices. It usually has a rectangular plug with four metal contacts.

The Type-B interface is used for connecting external devices such as printers and scanners. It usually has a square plug with four metal contacts.

In addition to Type-A and Type-B interfaces, there are other types of USB socket interfaces such as Micro-USB and USB-C. These interfaces are typically used for connecting mobile devices like smartphones and tablets.

The USB socket interface has many advantages, including ease of use, high data transfer speeds, hot-swappable capability, and broad compatibility. It has become one of the main standard interfaces for connecting and transmitting data.