High speed signal enhancement technology, SFF-8639 U.2 Transmission Protocol. Support NVME SSD & NGFF SSD Two groups of 5A high-power DC to DC power supply modules. High elasticity connector, strong connection, durability, stability and earthquake resistance, and hardware protection. Note: Two disks can work at the same time, but U2 X16 expansion card must be . B: m.2 NGFF of protocol; Usually there are two space (supported by this product). M key: m.2 NVME of pcie protocol; Usually a space (supported by this product). M.2 disks can be used only if they have NVME or label on them. Specifications: Name: M.2 to U.2 expansion card. PCI-E3.0 X4 GEN3 Transmission speed: U2 SFF-86 type: with shell colour: silver Material: PCB Size: 96x65mm Package Contents: 8 x adapter plate 8 x shell 8 pack x Screws 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.