1to4 breakout design: Single SFF8643 port splits into four SFF8482 hard drive connectors; Builtin SAS 15pin power port supplies both data and power for SAS hard drives; Supports 12Gbps ultrafast transmission for enterprise RAID arrays and storage controllers; Premium antiinterference shielding minimizes signal loss, crosstalk and electromagnetic interference; 1M ( 3.3FT ) length enables flexible internal routing for rackmount server chassis