Features: This M.2 to 8-Port RS232 Serial Card is the perfect solution for those who need multiple serial ports on their computer. With PCIe 2.0 Gen1 compatibility and a twisted pair or shielded cable transmission medium, this card offers fast and reliable communication between devices. The EXAR 17v358 chip and 15KV ESD protection ensure safe and efficient data transfer, making this card a must-have for any professional workspace. Direction Control: Utilizes technology that automatically controls data flow direction, automatically distinguishing and controlling data transmission direction. Use this card to connect multiple devices such as printers, scanners, and other peripherals in one place. Specifications: Type: Expansion Card Model: IO-M2F358C-8S Chip: EXAR 17v358 Output Interface: 8 RS232 Serial Ports Motherboard Slot: M.2 (B+M Keys) Interface Protection: 15KV ESD protection for all serial ports Data Bits: 7/8 Stop Bits: 1/2 Parity: Even/Odd/Mark/Space/None Working Temperature: -40 to 85 ℃ Storage Temperature: -65 to 150 ℃ System Support: Windows/Linux Size: Approx. 80x22mm/3.14x0.86in Note: Due to lighting effects and shooting angles, there may be certain tolerances in the product, please understand. Please allow 0-1cm error due to manual measurement. Package Includes: 1 Set M.2 to 8-Port RS232 Serial Card with Cables