The UTS-404A-SI is an Isolation and Surge Protection 4-Port RS-232 to USB serial adapter that is designed for PC, thin client, or server to provide instant COM port expansion via the Universal Serial Bus (USB). The UTS-404 provides the scalability toquickly adapt to new USB technologies. Multiple modules can be added to a single USB interface allowing you to add RS232 connectivity as needed. Complete product line offers many choices help you to expand and make your network grow with your requirements. With the USB Plug-and-Play feature, simply plug in, follow the instructions of Install Wizard, then you are done. You don’t have to deal with Card Slots, I/O address, IRQ jumpers, DMA and others when you are connecting the devices. The System will recognize the UTS-404A-SI and install the drivers automatically. The UTS-404 is an ideal solution for your expanding applications.