Features: 1Compatibility: M. 2 PCI?E4.0 to SFF8643?U2, supporting PCI?E4.0, downward compatible with 3.0 2High Transmission Speed: Supports PCI?E4.0, is compatible with PCI?E3.0, and the maximum theoretical transmission rate is 64GT / S 3Stable Performance: Stable performance, strong compatibility, high speed loss less transmission 4Standard M.2 2280 : The standard M.2 2280 size, retains the grain at 2260 position. It is designed as a cutting type to effectively ensure the strength when using 2280 5Call Transfer: M.2 NVME to SFF?8643 interface and need to be used with U2 cable , the motherboard supports nvme protocol. It can be used with PH49?M2 PH41?1U, and can support PCIE slots Package included: 1 x Adapter&nbspExpansion&nbspCard 1 x Screw 1 x Screwdriver&nbsp