escription: Four-port M.2 NVME interface can be expanded at the same time, and the transmission rate can reach 10000MB. Four-bay SSD front and back array card PCI-E X16 to M.2 NVME. High-speed solid-state drive acceleration expansion card, front and back 2 sides, smaller size. Specification: Product name: PCI-E to M.2 four-disk adapter card Transmission speed: equal 10000MB Card slot interface: X16 Support hard disk: M Key hard disk (NGFF is not supported) Support system: //Linux Indicator status: it is always on when the power is on, and flashes when reading and writing Material:Metal + Plastic colour:Black Package Contents: 1 x PCI-E to M.2 adapter card 1 x Half-height baffle 1 x screwdriver 1 set x Screw 8 x Silicone sheet 4 x Aluminum alloy heat sink Only the above package content, other products are not included. Note: Light 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.