USB-C

USB-C, formally USB Type-C, is a 24-pin reversible connector standard for carrying data, video, and electrical power over a single cable. It was published by the USB Implementers Forum (USB-IF) on 11 August 2014 and has since replaced the older rectangular USB-A and the various Micro-USB and Mini-USB plugs on most phones, laptops, peripherals, and consumer electronics.

USB-C is a connector, not a data protocol on its own. A given USB-C port can carry anything from low-speed USB 2.0 up to 80 Gbps USB4 Version 2.0, can negotiate up to 240 W of power through USB Power Delivery, and can route non-USB signals such as DisplayPort video through a feature called Alternate Mode. That combination of high bandwidth, high power, and a small reversible plug is the reason the connector is used across virtual reality (VR) and augmented reality (AR) hardware: it tethers headsets to PCs and consoles, charges standalone headsets, and feeds video to display glasses through one wire.

Origin and development

The USB Type-C connector was developed from 2012 by members of the USB-IF working with the USB 3.0 Promoter Group. Intel, HP, and Texas Instruments are named on the design document, and Apple and Microsoft were among other contributors. The goal was a single small connector that is symmetric (so it works either way up), reversible, and able to scale to future data rates and power levels, removing the proliferation of incompatible USB plug shapes.

The first USB Type-C Cable and Connector Specification, Release 1.0, was published on 11 August 2014. The standard has been revised several times to add capabilities such as higher power and faster data modes.

Specification release	Date	Notable addition
1.0	11 August 2014	Initial USB Type-C connector and cable
1.1	3 April 2015	Maintenance update
1.2	25 March 2016	Maintenance update
1.3	14 July 2017	Maintenance update
1.4	29 March 2019	Maintenance update
2.0	29 August 2019	Support for higher cable speeds
2.1	25 May 2021	Extended Power Range, up to 240 W
2.2	18 October 2022	Support for 80 Gbps USB4 Version 2.0

How it works

The USB-C plug and receptacle each have 24 pins arranged so the connector can be inserted in either orientation. The pins include two sets of high-speed differential pairs (so up to four data lanes can be used), dedicated USB 2.0 pins, power and ground pins, and two Configuration Channel (CC) pins. The CC pins let the two ends detect each other, decide which is the host and which is the device, set the cable orientation, and negotiate power and Alternate Modes.

Data rates

A USB-C connector can carry several different USB data modes depending on the host, device, and cable. The connector shape is the same in every case; the achievable speed depends on the silicon and cable.

USB mode	Maximum data rate
USB 2.0	480 Mbps
USB 3.2 Gen 1	5 Gbps
USB 3.2 Gen 2	10 Gbps
USB 3.2 Gen 2x2	20 Gbps
USB4	20 or 40 Gbps
USB4 Version 2.0	80 Gbps

Power Delivery

USB Power Delivery (USB PD) over USB-C originally allowed up to 100 W (20 V at 5 A). The USB Type-C specification Release 2.1, published on 25 May 2021, added the Extended Power Range (EPR), which raises the limit to 240 W (48 V at 5 A). This lets a single USB-C cable both transfer data and supply enough power to run or charge laptops, consoles, and headsets.

Alternate Mode

Alternate Mode reconfigures some of the connector's high-speed lanes to carry a non-USB protocol while the USB 2.0 pins keep working. The most widely used is DisplayPort Alternate Mode, announced by VESA together with the USB 3.0 Promoter Group on 22 September 2014. With all four lanes assigned to DisplayPort, a USB-C cable can drive a display at up to 5K (5120 x 2880) resolution while still passing USB 2.0 data; assigning only two lanes to DisplayPort leaves the other two for SuperSpeed USB at the same time. Thunderbolt 3, 4, and 5 also run over the USB-C connector. This is what allows phones and laptops to send video to AR display glasses through one USB-C wire.

Role in VR and AR

USB-C appears in VR and AR hardware in three distinct roles: as a tether that carries rendered frames from a PC or console to a headset, as the charging and data port of a standalone headset, and as the single video-plus-power link to AR display glasses.

Tethered PC and console VR

PC-tethered VR sends frames rendered on a computer to the head-mounted display over a cable. On Meta's standalone headsets this is done with the Quest Link feature, which streams PC VR to a Meta Quest 3 or earlier Quest model over USB. Meta states that Link needs a USB-C cable supporting USB 3.0 or higher with at least 5 Gbps of bandwidth, plugged into a USB 3 port on the PC. Meta's own Quest Link Cable is a 5 m fiber optic USB-C cable sold for 79.99 US dollars. Many third-party USB-C cables that meet the 5 Gbps requirement work as well, while ordinary USB-C charging cables generally do not because they lack the data wiring.

The PlayStation VR2 uses USB-C even more directly. Sony designed the PlayStation 5 with a dedicated USB-C port on the front of the console for the headset, and PSVR2 connects with a single 4.5 m USB-C cable that negotiates 12 V through USB Power Delivery and carries USB 3 data and DisplayPort Alternate Mode video at the same time. This single-cable design replaced the multi-box setup of the original PlayStation VR.

Charging and data on standalone headsets

Standalone headsets, which run their own processor and do not need a PC, use USB-C as their charging and wired data port. The Meta Quest 3 has a USB-C port on the left side of the headset; the included power adapter and USB-C cable charge it fully in about two and a half hours, and the same port is used for Quest Link and for transferring files to a computer. The Apple Vision Pro draws power from an external battery whose USB-C port can accept up to 65 W, well above the 30 W of the included adapter. Because the same port handles both power and high-speed data, a standalone headset needs only one external connector.

AR display glasses over a single cable

Tethered display glasses such as the Xreal Air series, Viture XR glasses, Rokid Max, and RayNeo Air models receive their video over USB-C using DisplayPort Alternate Mode. A phone, tablet, handheld console, or laptop whose USB-C port supports DisplayPort Alt Mode can drive these glasses directly with a single USB-C cable, sending video and supplying power at once. Devices that do not output video over USB-C need an adapter; Viture and Xreal sell USB-C or HDMI adapters that add DisplayPort Alt Mode output and a separate charging input so the host device can charge while driving the glasses.

Wired versus wireless

USB-C is the wired option for connecting a headset to a host; the alternative is wireless streaming, such as Meta's Air Link over Wi-Fi. A wire avoids the latency and image-compression trade-offs of wireless but limits movement to the cable's reach, which is why tethered headsets ship with cables of 4 to 5 m and why fiber optic USB-C cables are sold to extend that range without signal loss. Some setups combine both, using a Wi-Fi 6 bridge for movement while reserving USB-C for the lowest-latency connection.

EU common charger requirement

USB-C is also the connector mandated by the European Union's common charger rules. From 28 December 2024, a wide range of portable electronics sold in the EU that recharge by wire, including mobile phones, tablets, headphones, headsets, and handheld videogame consoles, must use a USB-C charging port; laptops come under the same requirement from 28 April 2026. The rule was adopted to reduce electronic waste and let one charger serve many devices. Because VR controllers, AR glasses, and standalone headsets fall under the categories covered, the regulation reinforces USB-C as the standard charging connector across XR hardware in that market.

Current status

As of 2026, USB-C is the standard physical connector on new phones, laptops, tablets, game controllers, and the great majority of VR and AR headsets. The connector's ceiling has continued to rise with USB4 Version 2.0 (80 Gbps) and the 240 W Extended Power Range, and DisplayPort Alternate Mode and Thunderbolt over the same plug keep it relevant for the high video bandwidth that headsets and display glasses require.