Adds 4 independent SATA 3.0 ports, each supporting 6Gbps max transfer speed, backward compatible with SATA 2.0 / 1.0 devices; Comes with full-height standard bracket and low profile half-height bracket, fits full-size ATX and slim small form factor PC chassis; PCIe x1 interface, compatible with all PCIe x1/x4/x8/x16 motherboard slots, no bandwidth bottleneck for daily storage use; Stable built-in main control chip, supports multiple hard drives, HDD, SSD and optical drives simultaneously without identification failure; Plug-and-play after driver installation, compatible with Windows and Linux systems for desktop, NAS and surveillance host storage expansion