Connect the USB A to B Cable to USB B socket of the module and USB port of the computer, install drivers and you will be assigned a COM port through which you can communicate as you do through a SERIAL port. You can easily communicate with microcontrollers / microprocessors from your computer through the module. If you need TTL pins for communication, you can find TX, RX and GND points on board, solder 3 berg sticks and connect it to TTL pins of microcontrollers for direct communication without DB9 connector (No need to use MAX232 / MAX3232 for RS232 to TTL conversion in this case)
Baud rates: 300 bps to 1 Mbps.
Byte receive buffer: 640 byte transmit buffer.
Compatible with both 3.3V & 5V levels
LED indication (ON only when port is opened and being used, otherwise OFF)
Temperature Range: -40 to +85.