Archgon MH-3621 USB 3.0 2.5 & 3.5 SATA Hard Drive Aluminum Dual-Bay Docking Station with Off-line Clone Function AC Adapter: Yes Material: Metal Dimensions: 149x108x62mm Maximum Capacity (per Bay): Up to 4TB Operating Systems Supported: Win XP/Vista/7/8, Mac OS 10.X Weight: 410g Package Contents: MH-3621 Unit, USB 3.0 Cable, AC Adaptor, User Manual