1to4 breakout design: Single SFF8087 port to four SFF8482 connectors for multidrive expansion; Builtin power supply delivers stable power and highspeed data transmission for SAS hard drives; 50CM compact length for tidy shortdistance internal wiring in compact server chassis; Servergrade antiinterference shielding minimizes signal loss, crosstalk and noise; Ideal for enterprise RAID arrays, storage controllers and data center hardware upgrades