4 Ports USB 2.0 hubs with USB power adapter. Charge and ... High quality, fashionable design, legerity convenient to carry, USB 2.0 version specification, high speed transmission may up to 480Mbps, ... USB peripheral product more stabilization and more efficiency, supports hot plug, low electricity consumption, built-in over-current ... and play.30 cm long cable enclosed. 2012 Hot Sales 2.0 4 Ports USB Hub