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Charging Speed: Full copper super speed USB 3.0 A to micro B cable is designed to connect devices with micro USB 3.0 such as external hard drives, printers, scanners and external DVD players to a USB 3.0 compatible PC or laptop, with data transfer rates at 10 times the speed of USB 2.0. It offers a durable, high quality connection with the full capability of the USB 3.0 standard which is backwards compatible to USB 2.0 and USB 1.1.