Interface Type:Mini PCI Type: On Cards Port:4 ports mini pcie serial Interface:Mini PCI- port:-485/422 Transmission distance:1.2km Applicable:mini PCI slot Chipset: 17V354 Type:mini pcie serial card Material: plastic colour: As shown Package Contents: 1 x PCIE Adapter Card Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real . The measurement allowed error is +/- 1-3cm.