The interface is USB3.0 19PIN TYPE-E 20PIN Adapter card - The interface is USB3.0 19PIN TYPE-E 20PIN, the connection is stable.Mounted to the PCI bracket, helps you easily connect the devices with type C interface. The type-C reversible design simplifies the connection and allows you to plug in any way without worrying about it being upside-down. Compatible with both USB 3.0 or USB 2.0 devices when both motherboard USB 3.0 & USB 2.0 headers are connected. Support systems - WINXP/WIN7/WIN8/WIN10 32/64BIT//Linux. Supports data transfer to and from all your USB-C devices at speeds of up to 10Gbps, and delivers 100W power supply. It's easy to hook up and install and its just an extension/port so no need to install drivers. Product: 19PIN to TYPE-E 20PIN Weight: 30g Product use: Because the current new computer case may have a TYPE-C front-end interface, but if the motherboard is not updated, you can use this TYPE-E adapter 20 to 19-pin expansion card to convert the motherboard USB3.0 interface 19PIN to TYPE-E, And install TYPE-C through the front of the chassis cable. colour:black + blue Material:PCB size:28.9x24.9x9.9mm Package Contents: 1 x TYPE-E adapter 20 to 19 pin expansion card 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.