The USB connector was developed in the mid-1990s, replacing the standard data connection and transmission interface of the serial and parallel ports of old USB boards. Until many years later today, USB connectors are still one of the most popular systems for data connection and transmission, thanks to their powerful capabilities, as they are easy to use, flexible, compatible, and reliable in terms of power capability.

1. Container: A USB socket is a "female" connector installed on a host (such as a computer) or device (such as a digital camera or printer).

2. Plug: A USB plug is a male connector that connects to a cable.

1. Grasp force

Unlike other older connectors, USB maintains its proper position on peripheral devices and cables through clamping force from the socket. No thumb rotation, screws or clips to keep it in place.

2. Durability

USB adopts an improved design, which is more sturdy and durable than previous connectors. This is because it is hot swappable, which allows the USB connector to be added to a running computer system without significantly interrupting the operation (i.e. shutting down or restarting the computer).

3. Protection performance

Upon careful observation of the USB connector, it can be observed that the adjacent plastic tongue and another enclosed metal plate protect the entire connecting component, providing additional protection for the USB. In addition, the USB plug also has a casing that first contacts the socket before connecting the pins to the host. To shield the wires inside the connector, the casing is grounded, which also helps eliminate static electricity.

4. Length limit

Although USB has these positive and enhanced features, the functionality of this data transfer interface still has limitations. Firstly, USB cables cannot connect peripheral devices and computers that exceed 5 meters (or 16 feet and 5 inches). The length of USB connectors is limited because they are designed to connect devices on a single desktop, rather than devices between structures or rooms. However, this can be solved by using a self powered USB hub or an active (repeater) cable. By using a USB bridge, the length of the USB cable can also be extended.