Thermaltake BlacX Duet Dual Bay SATA Hard Disk Drive Docking Station Read & Write 2 Hard Drives simultaneously. Supports All 2.5" & 3.5" SATA Hard Drives up to 2TB. Hot-Swap Capability for Rapid Multi HDDs Access & Exchange. Supports eSATA Transfer Speed up to 3.0 Gbps. Supports USB 2.0 Transfer Speed up to 480 Mbps. Windows & Mac OS Compatible. Rapid Data Access & Exchange w/ Single eSATA or USB Cable Connection. Open docking station design maximizes heat dissipation. RoHS Compliance. SSG (Solid State Grip) Technology: Anti-Slippery Grasp Base.