Using asm1064 main control chip, the transmission speed is fast and stable. Led monitoring indicator, the blue light is always on when it is inserted into hard disk drive, and blue light flashes when reading data, which can monitor working state of hard disk at any time. Support hot swap and hot swap, compatible with sata6g, 3G and 1.5g hard disk drives. It conforms to serial 3.0 specification and is downward compatible with sata2.0 and sata1.0. It conforms to PCI Express V3.0 specification and is downward compatible with PCI Express v2.0 1.0. Support 6.0 Gbps, 3.0 Gbps and 1.5 Gbps of communication speed Support Gen 1I, Gen 1X, Gen 2I, Gen 2m, Gen 2x, and Gen 3I Supports 4 Support ahci1.0 mode Support native queue (NCQ) Support switch or switching based on port multiplier. Support hot swap and hot swap. Sata6g, 3G and 1.5g compatible hard drives Bus interface: PCI Express X1 slot Expansion interface: 4 sata3.0 interfaces System requirements: a PCI Express X1 slot is available, and PCI-E x2 X4 X8 x16 is supported; when PCI-E x2 * 4 X8 x16 is supported, PCI Express X1 slot can be used. Interface: PCI-e 1x (compatible with 1X, 4x, 8x, 16x) Interface speed: 6Gbps Main control chip: asm1064 Color: As Shown Material: PVC + Copper + Iron Package Contents: 1 x 4-port III PCIe expansion card 1 x half-height bracket Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.