Dual RS232 Ports Expansion Converts M.2 (Key M/B) slot to two standard DB9 serial COM ports for connecting multiple RS232 devices.

PCIe 2.0 Gen1 x1 Interface Compliant with PCI Express 2.0; supports bidirectional 2.5 Gbps data link per direction for stable and fast communication.

High-Speed UART Performance 16550-compatible UART with 256-byte FIFO, baud rates up to 921,600 bps, and independent dual-channel design.

Industrial-Grade Reliability Operating temperature from -40°C to +85°C (-40°F to +185°F); supports hardware and software flow control with multiple parity options.

Broad OS Compatibility Comaptible with Windows XP10, Windows Server 20032019, and Linux 2.6.27 or newer; plug-and-play support for embedded and POS systems.