Insignia RS232 To USB Adapter (NS-PU99501-C) Easy plug-and-play connection of a device with a serial port to a device with a USB port Converts RS232 interface devices to USB for connecting to PCs with stable Prolific PL-2303 chipset 16 inch in length Supports Win 98 or above (Win 7 64-bit Supported), MAC OS X or above, and Linux One end is USB, other is RS232