Features: X1008 is a PCIe to Double HDD/SSD expansion board specifically for RPi5. Supporting 1x3.5inch HDD and2.5inch HDD/SSD, it provides mass storage and fast speed storage solution for RPi 5 to fully utilise the storage capacity. The 3.0 interface speed is up to 5Gbps. Please use DC12V power adapter to power both X1008 and for RPi5 via DC5521Jack, no more need to power for RPi5 additionally (Please note that 3.5inch HDD requires 12V). Simplifies your setups with the X1008 power supply feature that allows powering both the expansion board and the for RPi 5 through single DC12V adapter, eliminating the need for multiple power sources. Specifications: Compatibles for RPI 5 5B and supports expansion of other for RPi Adapter Supports connecting one 3.5inch HDD and one 2.5inch HDD/SSD at the same time. Follows PCIExpress 2.0 specification and is backward compatibles PCIExpress 1.0 Supports HAT+STANDBY power state, which automatically shuts down devices when the for RPi5 power down. Supports communication rates of 5.0Gbit, 3.0Gbit 1.5Gbit Compatibles 6G, 3G, 1.5G hard disks Power Supply Description Power: DC12V via the X1008 expansion board via DC5521Jack Size：about 16.45x10.14cm/6.48x3.99in Package Includes: 1PC X1008 Expansion Board note: The X1008 for data storage purposes and currently not support booting from HDD/SSD using existing firmware. New hard disks are not partitioned and will need to be partitioned and formatted on first use before you can access them in Explorers.