The PL2303HXD 6-Pin USB TTL RS232 Converter Serial Cable is a low-cost, high-performance USB-to-Serial Bridge controller. It provides a convenient solution for connecting an RS-232 device to a USB port and supports full-duplex asynchronous serial communication to any Universal Serial Bus (USB) capable host. The PL-2303HXD‘s highly compatible drivers can simulate the traditional COM port on most operating systems. It allows the existing applications based on COM-port to migrate and be made USB-ready.