M.2 M-Key: NVMe protocol.Support M.2 SSD hard disk (2230/2242) LED indicator: power indicator.ACT hard disk status indicator PCle 2.0 interface rate: transfer rate up to 500MB/S (official data) Size: 65x56.5mm SSD function: support SSD hard disk to start the system and storage expansion or only storage expansion M.2 device power supply current: 3A Compatible with PCle standards: Gen2 and Gen3 Due to different batches, there may be differences in product appearance, color, and printed text, which not affect the use. Colour:Green Material:PCB+Aluminum Alloy Type:256GB Package Contents: 1x Expansion Board Kit Only the above package content, other products are not included. Note: Light reflection 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.