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Tripp Lite's U222-004 is an inexpensive way to expand the number of available computer USB ports. Its compact design with built-in cable is perfect for travel, fitting easily into a laptop bag pocket. Supports USB 2.0 data transfer rates up to 480Mbps and is backward compatible with USB 1.1. Bus-powered through the computer's USB port -- no external power required, it includes a Micro B port for an additional connection to the computer in case more power is needed.
All four ports support USB Battery Charging (BC) specification v1.2, providing up to 1.5A for fast charging of mobile devices (BC 1.2 charging requires external power, available separately).