1 pcs ram connector adapter & 1 pcs usb 3.1 to type-c 2 port expansion card adapterbus type: pci express x4, compatible pcie x4/x8/x16 slot.good compatibility: compatible with windows 7/8/8.1/10/linux kernel.pci-e to usb3.1: expand your computer with two more portsusb3.1 gen 2: the pci-e card is equipped with 10gbps bandwidth, which ensures fast data transmission, real speed of usb3.1 for individual port.plug & play and hot swapping capability.stable and reliable asmedia chipset asm3142the 15-pin sata power connector supplies power to usb-c enabled devices, and supports up to 5v 900mah output on each usb 3.1 port.supports 10gbps pci-e bus with full duplex channel. built-in over current protection and short circuit protection on each usb port.support superspeed+ (10 gbps), superspeed (5 gbps), highspeed (480 mbps), and fullspeed (12 mbps) (note: the actual transmission speed is limited by the setting of the device connected.)support usb 3.1 devices,backwards compatible with usb 3.0, 2.0 & 1.1Adapter Card:Model Number: Computer AccessoriesInterface Type: DDR4Material: Electronics + MetalFeature 1: Laptop RAM AdapterFeature 2: DDR4 Card Transfer AdapterType: Add On Cards,PCI to USB 2.0 Card,PCI to 1394 Card,PCI-E to USB 3.0 Card,PCI-E 4X to 16X Card,PCI-E 1X to 16X Card,PCI-E to M.2 Card,PCI Raid Card,PCI-E Raid Card,Diagnostic Card,PCI-E Graphic Card to Exteranl Card,PCI-E to USB 3.1 Card,MINI PCI-E to PCI-ECard,M.2 SSD to PCI-ESupports 2133Mhz Frequency SO DDR4 Memory.4-Layered PCB Design.Compliant with JEDEC Specifications.Over-Current Protection Design.PCB dimension: approx.133x36mm/5.23x1.41incolour: blue2-port USB 3.1 PCIE Expansion Card:Support High-speed PCI-E 3.0 specificationSupport PCIe 1.0, PCIe 2.0, or PCIe 3.0 motherboard, Compliantwith PCI Express Base 3.0 Specification, Compliant with Universal Serial Bus 3.1 SpecificationNote: NOT compatible with macOS operating systems.Material:metalcolour:blackPackage Contents:1 * Adapter Card1 * 3.1 Type C Dual Port Expansion Card Adapter1 * Low Profile BracketOnly 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.