The eSATA+USB port can connect to the Host port of a laptop. 2. The SATA 22PIN interface can connect a 2.5" hard drive without requiring an external power supply. It only supports 5V power, which is sufficient to power a 2.5" hard drive. Compatible with SSDs, Blu-ray DVD, CD-ROM, DVD-ROM, CD-RW, DVD-RW, and DVD+RW combo drives; compatible with Windows (3.5" hard drives require 12V power, so they cannot be powered). Length: 50cm; Color: Black. Usage: Suitable for connecting SATA 2.5" laptop hard drives to laptops and desktop computers with USB and eSATA interfaces, for data transfer and power supply. The external SATA 6 Gbps shielded cable brings high-performance external Serial Advanced Technology Attachment (eSATA) from your computer or DVR to external storage devices with eSATA ports. Replace or expand the internal hard drive of DVRs or satellite receivers. Connect to an external SSD dock to achieve faster data transfer speeds than USB 3.0, for file backup and expanded storage.