Compact USB to RS232/485 Converter is ideal for small premises with few readers and unavailability of network. The USB to RS232/485 Converter provides a slow mode of communication whereas the distance between the reader and computer is also limited. The USB to RS232/485 Converter works by connecting each reader that connects to one COM port of computer. Compact USB to RS232/485 Converter is offered in a compact design and consumes less power during operation.