Supports transmission rates of SAS/SATA 6.0Gbps, 3.0Gbps, 1.5Gbps. Offers a throughput of up to 5Gbps when used with a USB 3.0 host and device, an 10x the capability of USB 2.0. Only SFF-8482 SAS hard disks are supported, and SFF-8639 U.2 hard disks are not supported. The card need 12V/3A DC5.5x2.1mm plug Power Supply, The power supply not include in the package, You need to buy it separately if you have not it. This adapter has built-in chip, Can convert SAS disk to the USB interface of the common motherboard, so USB computers can also use the SAS disk and no need any SAS raid card. If your USB interface without SAS function, Connect our adapter, it can directly read/write SAS hard disk, support win7, win10, win11, lunix operating system. After conversion, the SMART of the SAS hard disk will display incomplete or no information, but it will not affect normal reading and writing. Color: Black Material: plastic Package Contents: 1 x SAS Hard Disk Drive Adapter