Description: M.2 to 4-Port RS-232 Serial Card Connector4*RS-232 connector CableDB9 9PIN Flat Data Cable Support4*RS-232 connector Host BusPCIe 2.0 x1 Product uses EXAR 17v354 chipset solution to expand 4 RS-232 Serial ports(DB9 Pin) through M.2 slot. It can connect 4 RS-232 Serial devices at the same time to provide modulation and control signals so to ensure the compatibility of peripheral equipments. It provides cost-effective, high speed and stable solutions to customers. Spec: Support PCIe2.0 Gen 1 Adopt M.2 B Key+M Key connector, small in size with excellent transmission performance 4 standard RS-232 serial ports, each can reach to 921.6Kbps Multi-port serial devices communication through 4 DB9 Pin cables 256Byte of TX and RX FIFO, On-board hardwares, softwares flow control and burst datagram Support Windows, XP, Vista, Linux and so on Application: Widely used in POS Systems, Serial Port Net, Printer, Industrial Control, Automation Systems and other Serial Devices. Product Name M.2 to 4-Port RS-232 Serial Card I/O Controller XR17V354 Connector 4*DB9PIN RS-232 connector Host Bus Type PCIe 2.0x 1 M.2 (B+M) Key Power Supply 3.3V Humidity 15%~ 90% OperatingTemperature 5°C - 50°C (-41°F - 122°F) Storage Temperature -25°C ~70°C (-13°F ~ 158°F) Dimension 22mmX80mm Weight 6.6g Item List M.2 to 4-Port RS-232 Serial Card