Matefield 5.25inch 3.5inch Internal Card Reader Type-C+2 xUSB3.0 Port Hub Front Panel Specification:Material: metal high heat dissipation materialStructure design: with screw fixed design, stable, light and durable.Transmission speed: USB3.0 theoretical transmission speed as high as 6GbpsSupport operating system: Windows operating system, Linux, for Mac OSCard reader slot: for SD /for Micro SD / TFInterface: 2 x USB 3.0 Type-CSize: 100*93*24mm/3.93*3.66*0.94''Note:  Please allow 1-3mm differs due to manual measurement.Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understanding.