This M2- to 8 Port RS232 Serial Card is the perfect solution for those needing multiple serial ports on their computer. With PCIe2.0-Gen1compliance and a transmission media of twisted-pair or shielded cable, this card offers- fast- and reliable communication between devices. The EXAR 17v358 chip and 15KV ESD-protection safe and efficient data transmission, making this card a must-have for any professional workspace-. Direction control: Adopt the technology which automatically controls- the data-flow direction,automatically distinguish and control the data-transmission direction. Use this card to connect multiple devices such as printers, scanners, and other peripherals place. Type: Expansion Card Model: IO-M2F358C-8S Chip: EXAR 17v358 Output interface: 8 RS232 serial ports Motherboard- slot: M2- (B+M Keys) Interface protection-: 15KV ESD-protection for all- serial ports Data bits: 7/8 Stop position: 1/2 Check digit: Even/Add/Mark/Space/None Working temperature: -40 to 85 ℃ Storage temperature: -65 to 150 ℃ System support: -/Linux- Size: 80x22mm/3.14x0.86inch Colour:black Material:pc Due to different batches, there may be differences in product appearance and printed text, which not affect use Package Contents: 1 Set * M2-to-8-port RS232 Serial Card with Cables Only the above package content, other products are not included. Note: Light reflection 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.