• USB standards are implemented by the USB Implementers Forum (USB-IF) "founded by the companies that developed the USB standard and now want to sue and develop it." This corporation "develops and maintains the USB standards, including Wireless USB, and runs a compliance program to maintain the quality of USB products and ensure compatibility between devices."

USB 4

• The USB 4 has a max. data transfer speed is 40Gbps and is based on Thunderbolt 3 specification.

USB 3.2 Gen 2x2

• The most recent USB version 3.2 Gen 2 was introduced in 2017.
• Its max. data transfer speed is 20 Gbps.
• The stipulated connector type is USB-C**.
• Its cable length is 3m, and the maximum power capacity is 100w.

USB 3.2 Gen 2

• The USB 3.2 Gen 2 was introduced in 2013.
• Its max. data transfer speed is 10 Gbps.
• The stipulated connector types are USB-A, USB-B, USB Micro-B, and USB-C**.
• Its cable length is 3m, and the maximum power capacity is 100w.

USB 3.2 Gen 1

• The USB version 3.2 Gen 1 was introduced in 2008.
• Its sax. data transfer speed is 5 Gbps.
• The stipulated connector types are USB-A, USB-B, USB Micro-B, and USB-C**.
• Its cable length is 3m, and the maximum power capacity is 4.5w.

USB 2.0

• USB version 2.0 was introduced in 2000.
• Its max. data transfer speed is 480 Mbps.
• The stipulated connector types are USB-A, USB-B, USB Micro-A, USB Micro-B, USB Mini-A, and USB Mini-B.
• Its cable length is 5m, and the maximum power capacity is 2.5w.

USB 1.1

• USB version 1.1 was introduced in 1995.
• Its max. data transfer speed is 12 Mbps.
• The stipulated connector types are USB-A and USB-B.
• Its cable length is 3m, and the maximum power capacity is 2.5w.