The IOCrest SI-ADA15069 lets you add 2 RS-232 serial ports to your embedded computer thought a free M.2 Slot. To be used in applications such as serial attached devices, serial networking/monitoring equipment, data acquisition system, POS terminal and industrial PC, add-on I/O cards-serial/usb, and Embedded systems -For I/O expansion OS SUPPORTED: Windows Server 2003, 2008, 2012,2016,2019 Windows XP, Vista, 7, 8,8.1,10 Linux 2.6.27, 2.6.31, 2.6.32, 3.x.x and newer