Brainboxes PX-335. Host interface: PCIe, Output interface: PCI-Express/Serial, Connector(s): 4 xRS422/485 9-pin. Data transfer rate: 0.9 Mbit/s. Width: 80 mm, Depth: 146 mm, Height: 20 mm. Certification: CE, ROHS, WEEE. Colour of product: Green