Built-in JMB575 PM port multiplier chip, expand 1 B+M M. 2 SATA slot to 5 independent SATA 3.0 6Gbps ports; Standard 2280 NGFF B+M Key form factor, only works with motherboard M. 2 SATA slot (NVMe M-Key slot not supported); Each SATA port reaches 6Gbps bandwidth; supports cascading to connect up to 15 storage drives in total; Integrated aluminum cooling heatsink + individual disk activity LED indicators for stable long-hour heavy load operation; Driver-free plug & play for Windows & Linux, ideal for NAS, file server and mass storage expansion