Overcurrent protection overvoltage protection leakage protection short circuit protectionMulti system compatibility without driver, compatible with windows series, MacOS and Linux systemsPCIe X4 card slot is compatible with the motherboard u.2/sata dual protocol compatible with pciex8 / x16 card slot interfacePCIE4. 0 X4 to u.2/sata dual protocol hard disk adapter cardsize:132x83x18MMMaterial:PCB+Metalcolour:BlackPackage Contents:1 x U.2 TO PCIE X4 Riser Card1 x sata cable1 x Screwdriver1 x Thumb screw4 x Fixed hard drive screwsOnly the above package content, other products are not included.Note: Light shooting 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.