The VIA Labs VL810 was the world's first USB 3.0 4 port hub controller. The second generation design, the VL811 ads a new feature called a Charging Downstream Port or CDP. A CDP port can charge a BCS-compatible device three times faster than regular USB 3.0 devices. In fact you can use the device at full speed whilst charging.
"The VIA Labs VL811 enables a single downstream port of a host computer or another hub to simultaneously interface with multiple USB devices. The VIA Labs VL811 hub controller supports the higher transfer rates of the USB 3.0 specification, allowing maximum data transfer rates of up to 5Gbps, or ten times the maximum throughput available to USB 2.0 based devices, while remaining fully backwards compatible with USB 2.0 and 1.1 hosts, hubs, and devices. In addition to rapid transfers, the VIA Labs VL811 also allows for rapid charging of BCS compatible devices through the CDP feature."Find out more on the VIA Labs site.
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