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Regarding thedescription of the item:

Product parameters
【Product Name】: PCI-E to 2-Port Expansion Card
【Product Model】: DW-WCH382-2S
【Chip Model】: WCH382L
【Driver Support】: Windows 2000/xp/server 2003/xp 64-bit/Vista/win 7, Linux Dos, MAC
Product features
Supports standard serial mode, plug-and-play, with automatic identification function
Complies with PCI-Express 1.0a standard
Driver supports Windows 2000/xp/server 2003/xp 64-bit/Vista/win 7, Linux Dos, MAC
The serial port part has interrupt control address, which better solves the complex transmission control system and effectively ensures that the data stream will not be lost.
Outputs 2 independent 9-pin standard serial ports, exclusive interrupt port numbers instead of virtual devices, can be connected to various serial port devices for data transmission rate: 110 - 230400 Bps