Features: X1009 is a PCIe to PCIe to 5-port expansion board for RPi 5 5B. Supports 5 high-capacity storage devices connection at the same time; SATA3.0 interfaces up to 5Gbps. Provide high-capacity storage and fast transmission for your RPi 5 5B, giving full play to the storage capacity for RPi. The X1009 standard DC12V input on board and equipped with a highy efficiency convert to power both for RPi 5 5B and PCle devices. Equipped with high efficiency convert to power for RPi 5 5B and devices at the same time ；Supports 5 hard disks We have tested 4x3.5‘ HDDs and 1x2.5’ HDD and the current required around 6A. Specifications: For RPi 5 5B compatible Not support booting from HDD/SSD with existing firmware. Supports simultaneous connection of 5 SATA3.0 devices. Compliant with SerialATA3.0 specification, backward support SATA2.0 and SATA1.0. Connect to both 2.5inch hard disks and M.2 Bkey 2280 Solid disks at the same time Not support M.2 NVMe ssd, M.2 PCle AHCl ssd Booting from HDD/SSD with existing firmware is not supported. Package Includes: 1Set X1009 Expansion Board note: Amount of current you need depends on startup current of HDD you are using ( startup current will be higher than operating current) Please allow 1-2cm errors due to manual measurement. Pictures may not reflect actual color due to different monitors.