Drive Connectors: 4 - SATA Data & Power Combo (7+15 pin), Host Connectors: 1 - USB 3.2 Type-B (9 pin, Gen 1, 5Gbps), Interface: USB 3.2 Gen 1 (5Gbps), Number of Drives: 4, Drive Size: 2.5in & 3.5in, Drive Installation: Removable, Fans: 2 - 40 mm, Maximum Data Transfer Rate: 5 Gbps, 4Kn Support: Yes, Type and Rate: SATA III (6 Gbps), Color: Black, Material: Plastic, Cable Length: 0.9 m [3.0 ft]. Our SDOCK4U33 Quad-Bay USB 3.0 to SATA Hard Drive Docking Station enables access to up to four 2.5/3.5" SATA drives from your desktop or laptop computer over USB 3.2 Gen 1 (5 Gbps).