Bplus EC4U-5V3A : USB3.0 1-port ExpressCard/34 Host Adapter with AC adapter for external 5V input, Hella flush USB port EC4U is Expresscard to USB 3.0 adapter converter. You can easily add USB 3.0 to your notebook with 34/54mm ExpressCard slot. Hella Flush USB port, 5V 3A Adapter included : INPUT : AC110-240V ~50/60Hz 0.5A Output : 5V 3A Internal 5V 900mA DC2DC circuit for USB3.0 current NEC / Renesus : uPD720200 controller