Device Port Devices Manufacturer SIIG Inc. Model No. JU-CS0311-S1 CPU/Chipset(s) FTDI FT232BL Interface/port(s) USB Type A - usb 2.0 Port(s) RS-232 (DB9) The SIIG JU-CS0311-S1 uses a FTDI chipset the drivers can be download on link below. Drivers: FTDI FT232RL Serial to USB Drivers (Windows 11/10/8/7/Vista/XP)