Supprots PCle, For 5 only supports PCle x1, with Gen2 and Gen3 modes, M.2 M-key, supports NVMe SSD, Supports 2242/2230 size SSD (only 2242 copper pillars are welded by default) SSD booting system, Supports booting the system from the NVME SSD hard disk and storage expansion. The SSD can also be used for storage only and the system boots from TF. M.2 power supply, The power supply circuit of the expansion board adopts a 2A current design, which is limited by the current limit of the PCIE interface of 5 (5V1A), and can provide 3.3V over 1.5A to the SSD. Generally, the current requirements marked on SSD may be 2.5A, 2.7A or even 3A.but this current corresponds to the max value of PCle x4 mode, however, for 5 only supports x1 mode, so the actual current needed is much smaller. Our meet most SSD needs. Dual LED indicators on-board: power indicator ("PWR") and M.2 activation indicator ("ACT") High-quality components adopt high-quality electronic components . PCB board Gold sinking process,lesd-free production 4 M2.5 fixing holes and a concave design on the top of the board facilitate the operation and use of 40Pin GPIO The appearance and color of different batches of products may be different, which will not affect the use. Colour:random color , don't accept the specified color Material:PCB Package Contents: 1 x Expansion Board 1 x FPC cable 1 x Case 1 x SSD Heat Sink 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.