4 Ports USB 2.0 hubs with USB power adapter. Charge and connect any USB device. Powered by computer USB port or USB adapter. OverviewA ... devices. High quality, fashionable design, legerity convenient to carry, USB 2.0 version specification, high speed transmission may up to 480Mbps, can ... and play.30 cm long cable enclosed. 2012 Hot Sales 2.0 4 Ports USB Hub