USB Standard-B Plug Receptacle Connector

USB Type B connectors, officially referred to as Standard-B connectors, are square in shape with either a slight rounding or large square protrusion on the top, depending on the USB version.

USB Type-B connectors are supported in every USB version, including USB 3.0, USB 2.0, and USB 1.1. A second type of "B" connector, called Powered-B, also exists but only in USB 3.0.

USB 3.0 Type B connectors are often the color blue while USB 2.0 Type B and USB 1.1 Type B connectors are often black. This is not always the case, as USB Type B connectors and cables can come in any color the manufacturer chooses.