1to4 fanout design: Single SFF8643 port splits into four SAS 29pin SFF8482 hard drive ports; Supports 12Gbps ultrahighspeed transmission for enterpriselevel SAS storage performance; Compatible with standard SAS hard drives via SFF8482 interface for easy expansion; Servergrade shielding minimizes signal loss, crosstalk and electromagnetic interference; Durable build quality ideal for RAID arrays, data centers and highdensity server storage