Features PCI-Express 2 serial RS-232 ports add-on card High-speed up to 2 MBps data transfer rate Specifications Chipset: WCH382 Standard: PCI-Express rev. 1.1 IRQ and I/O address assigned by BIOS Baud rate: 50 bps ... 16 Mbps RS-232 DB9 signals: TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND Additional low-profile bracket Dimensions: 67 x 120 x 20 mm Net weight: 80 g System requirements Windows 7/8/10/11 (x86 / x64) Free PCI-Express 1.1 single-lane (x1) slot