Connecting USB with the traditional RS-232 serial port, this adapter connects   cellphones, PDAs, digital cameras, modems, or ISDN terminal adapters through   your USB port. Has a data transfer rate of over 250 kbps. Since the adapter   uses no IRQs, there are no IRQ conflicts, and it is ideal for when you need   many serial devices attached to your PC. Use this adapter to connect directly   to a serial device or to free your RS-232 port for other uses.

Connector 1: USB Type A Male
Connector 2: DB9 Male