Dual Bay 2.5-Inch Internal SATA Tray-Less Hot Swap Rack with LED Indicator Supports two 2.5" SATA hard drives and fits into any standard 3.5" drive bay Device Support: SATA I/II/ Hard Drives & SSDs Supports SATA II and maximum data transfer rates up to 3.0 Gbps Dual LED function: Power on, HD activity Supported data transfer rates : 3.0