This mini USB to RS-232 Plug-in
Adapter is designed to make serial port expansion quick and simple. By
connecting the unit to a USB port on your Tablet PC, notebook or PC, this
USB-COM Plug-in adapter will instantly add RS-232 serial communication port
to your system. The product is the smallest and most flexible USB to RS-232
Plug-in Adapter. The USB-COM-PL is featured with the biggest internal FIFO,
128 byte transmit and 384 byte receive FIFO, for high-speed data transfer
rate.