Comply with Serial ATA 3.0 specification, backward compatible with SATA2.0 SATA1.0 Comply with PCI-Express v2.0 specification and backward compatible with PCI-Express v1.0. Support 6.0 Gbps, 3.0 Gbps and 1.5 Gbps of communication speed Supports Gen 1i, Gen 1x, Gen 2i, Gen 2m, Gen 2x, and Gen 3i. Support 4 SATA Support AHCI1.0 mode and IDE mode Support native command queue (NCQ) Support FIS based on port multiplier switch or command switch. Support hot swap and hot swap. Compatible with SATA6G, 3G and 1.5G hard drives Bus interface: PCI-Express x1 slot Expansion interface: 6 SATA3.0 interfaces System requirements: There is an available PCI Express X1 slot, while supporting PCI-E X2 X4 X8 X16 Operating system: Windows10/8/7 (32/64 bit)/ Vista (32/64 bit)/ XP/2003/2008/linux Synology can only recognize 4 disks, please know Colour: black Material: PC + metal Size: 16x13x5CM Package Contents: 1 * SATA3.0 expansion card Only the above package content, other products are not included. Note: Light shooting 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.