Compliant with PCI Express Specification Version 2.0 X1 link dual simplex, 2.5Gbps in each direction Supports x1, x2, x4, x8, x16 (lanes) PCI Express slot supports 2 RS232 ports 16 multi-purpose input/output () 16-bit general-purpose timer/counter Serial data rates up to 31.25Mbps Data bits: 5, 6, 7, or 8 Stop bits: 1, 1.5, 2 Parity Even/Odd/Mark/Space/None control: None, Hardware, and Xon/Xoff 256-byte TX and RX FIFOs TX/RX FIFO level counter Automatic / or DTR/ hardware control with programmable hysteresis Multi-address/drop with automatic address detection Infrared (IrDA 1.1) data encoder/decoder Operating temperature range: -40 to 85℃ Connector type:M.2 B+M Key (The product printed words depending on the batch, but this does not affect use) Color:As Shown Material:PCB Package Contents: 1 * M2 B+M Key to 8 Ports RS232 Card kits 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.