LED monitoring indicator: the blue light is always on when the hard disk is inserted, and the blue light flashes when reading data to monitor the working status of the hard disk at any timeLong-lasting durability with heat sink: The chip enhances heat dissipation, long-lasting high temperature resistance and more stable operation.No need to drive plug and play: support mainstream Windows, Linux, .NAS, support hard disk/optical drive/SSD solid state drive with SATA interface.Support PCI-E4X/8X/16X interface: PCIExpress3.0 architecture Single channel (1) One-way bandwidth theoretical speed is close to 1GB/S This product has 4 channels (4) Two-way bandwidth theoretical speed can reach 8GB/SProduct name: PCI-E4X to SATA3.06 port expansion cardProduct master: ASMedia ASM1166 masterProduct interface: Pc-e4x8x16x (recommended to use under pci-3.0, faster)Support system: win/win10//UbuntuColour:BlackMaterial:Plastic + MetalSize:120x85x68mmPackage Contents:1 * PCI-E expansion adapter1 * BezelOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.