PCIE x16 to x8+x4+x4 splitter adapter card, front and back double sides .2 NVME x2 designed. This product can run 2 NVMEs simultaneously, but only if the motherboard supports PCIE signal splitting. Supports PCIE 4.0, strong compatibility and downward compatible with 3.0, stable operation. Product front and back .2 can connect to NVME 5 kinds specifications of SSD, PCIE X16 can connect to PCIE expansion card, adapter card. Front and back .2 can connect to NVME expansion and .2 NVME SFF-8639 card. Material:PCB Color:Black Size:150x38mm Input Port:PCIE X16 ,.2 NVME x2 Speed:PCIE 4.0 ,compatible with 3.0 Package Contents: 1x PCIE4.0 Expansion Adapter 1 x screwdriver 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.