(Universal Serial Bus)- An interface made to be universally adopted by device manufacturers as a standard power and communications capable interface. It’s widely implemented accross billions of devices, and there exists several generations of the standard retroactively compatible with eachother. Each generation provides incremental imporvements in maximum speed and power output, these standards are :
USB2: capacity- 480mbps power- 5V at 1.8A
USB3: capacity- 4.8Gbps power- 5V at 1.8A
USB3.1: capacity- 10Gbps power- 5V at 2A, 12v/20v at 5A