Rosewill Full Aluminum Cover Metal Tray 3.5-Inch USB 3.0 External Enclosure, Silver (RX35-AT-SU3 SLV) Size: 3.5" AC Adapter: 100-240 AC Adapter with 12V/DC output Internal Interface: SATA I/II External Interface: USB 3.0 Maximum Capacity (per Bay): Up to 3TB (WinXP Not supported 3TB) Transfer rates up to 4.8 Gbps with USB 3.0 Green Power Management - reducing the energy consumption and extending HDD lifetime by preventing HDD spinning constantly while not in use Light and small design for easy portability