Features: 100% brand new and high quality With a large heat sink, heat dissipation is better. The rear four ports design is more convenient for wiring. Rear four-port design, suitable for all kinds of chassis. The rear edge design, and the probability of blocking the card player is less. The four-layer circuit board, with the addition of insulation layer in the middle, has stronger anti-interference ability. Mode selection Original, AHCL, IDE, data disk, three modes are free to choose. The three modes can be selected by pulling the switch:Hard disk boot system in AHQ mode.Data disk mode, the boot does not intervene on the hard disk (at the same time it can turn off the self-test interface).Hard disk boot system in IDE mode. Package Includes: 1PC x PCI Express to 4-Port SATA 3.0 Adapter 1PC x Low Profile Bracket 1PC x Driver CD Specifications: Bus interface: PCI-E X1 (compatible with X4, X8, X16 graphics card interface) Transmission speed: 6Gbps Number of interfaces: SATA 3.0 X4 System Support: Compatible with Windows XP / 2003 / Vista / win7 / in8 / win10 (32/64-bit) note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you