• Support all brand of 3.5" SATA I / II / III hard disk drive up to 8TB per drive, and up to 4 x 8TB <br />• Support SATA 3 6.0Gbps hard drive transfer rate <br />• Transfer rate up to 5.0Gbps via USB 3.0, Transfer rate up to 6.0Gbps via eSATA <br />• Comptaible with Mac USB 3, Smart Fan Function <br />• Thermal Sensor built-in, Auto and Manual Mode and One Button Interface selection to switch USB 3.0 or eSATA Interface