End device have to be self-power standard eSATA device only. | Adapter cannot be use to connect USB devices as the end device. | Supports eSATA 6Gb/s (SATA III) Devices, eSATA Backward Compatible with SATA I/II/III devices | Hi-Quality Shielded USB 3.0 Cable Ensures Data Integrity and Speed | USB 3.0 SuperSpeed Backwards Compatible with USB 2.0 or 1.1 , Maximum Transfer Rates Up to 5 Gbps w/USB 3.0