Allows you to power a single device from 2 USB ports. An additional USB type-A connector allows the cable to be connected to two USB ports (2.0 or 3.0) for maximum power and performance. Great for HDDs, PCs, laptops, mobile phones, digital cameras, printers, Wii-U or other devices with low power output USB ports. Compact and lightweight for portability. Backwards compatible with high speed USB 2.0 devices and USB 1.1.