Amazon Basics USB 2.0 A-Male to Micro B Cable, 3 feet, Black

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The USB3.0 specification was released on 12 November 2008, with its management transferring from USB3.0 Promoter Group to the USB Implementers Forum (USB-IF) and announced on 17 November 2008 at the SuperSpeed USB Developers Conference. [29] Nice Micro-USB adapter Apple, now sell it everywhere", Giga om, 5 October 2011, archived from the original on 26 August 2012

USB was designed to standardize the connection of peripherals to personal computers, both to exchange data and to supply electric power. It has largely replaced interfaces such as serial ports and parallel ports and has become commonplace on a wide range of devices. Examples of peripherals that are connected via USB include computer keyboards and mice, video cameras, printers, portable media players, mobile (portable) digital telephones, disk drives, and network adapters. Europe gets universal cellphone charger in 2010". Wired. June 13, 2009. Archived from the original on August 18, 2010 . Retrieved June 22, 2010. USB2.0 provides for a maximum cable length of 5 meters (16ft 5in) for devices running at high speed (480Mbit/s). [88]A USB system consists of a host with one or more downstream facing ports (DFP), [52] and multiple peripherals, forming a tiered- star topology. Additional USB hubs may be included, allowing up to five tiers. A USB host may have multiple controllers, each with one or more ports. Up to 127 devices may be connected to a single host controller. [53] [30] :8–29 USB devices are linked in series through hubs. The hub built into the host controller is called the root hub. Includes new USB4 Gen2×2 (64b/66b encoding) and Gen3×2 (128b/132b encoding) modes and introduces USB4 routing for tunneling of USB3.2, DisplayPort1.4a and PCI Express traffic and host-to-host transfers, based on the Thunderbolt3 protocol; requires USB4 Fabric. Portable devices having a USB On-The-Go port may want to charge and access a USB peripheral simultaneously, yet having only a single port (both due to On-The-Go and space requirement) prevents this. Accessory charging adapters (ACA) are devices that provide portable charging power to an On-The-Go connection between host and peripheral. Universal phone charger standard approved—One-size-fits-all solution will dramatically cut waste and GHG emissions". ITU (press release). Pressinfo. 22 October 2009. Archived from the original on 5 November 2009 . Retrieved 4 November 2009.

By design, it is difficult to insert a USB plug into its receptacle incorrectly. The USB specification requires that the cable plug and receptacle be marked so the user can recognize the proper orientation. [1] The USB-C plug however is reversible. USB cables and small USB devices are held in place by the gripping force from the receptacle, with no screws, clips, or thumb-turns as other connectors use. a b Universal Serial Bus Cables and Connectors Class Document (PDF), Revision 2.0, USB Implementers Forum, August 2007, p.6, archived (PDF) from the original on April 27, 2015 , retrieved August 17, 2014 The Chinese technical standard: "YD/T 1591-2006, Technical Requirements and Test Method of Charger and Interface for Mobile Telecommunication Terminal Equipment" (PDF). Dian yuan (in Chinese). Archived from the original (PDF) on 15 May 2011. The PCI Express function of USB4 replicates the functionality of previous versions of the Thunderbolt specification.There are so-called cables with A plugs on both ends, which may be valid if the "cable" includes, for example, a USB host-to-host transfer device with two ports. [3] This is, by definition, a device with two logical B ports, each with a captive cable, not a cable with two A ends. The first Power Delivery specification defined six fixed power profiles for the power sources. PD-aware devices implement a flexible power management scheme by interfacing with the power source through a bidirectional data channel and requesting a certain level of electrical power, variable up to 5A and 20V depending on supported profile. The power configuration protocol can use BMC coding over the CC wire if one is present, or a 24MHz BFSK-coded transmission channel on the V BUS line.