Connecting USB (Universal Serial Bus) with the traditional RS-232 serial port, this adapter connects mobile phones, PDAs, digital cameras, modems, or ISDN terminal adapters through your USB (Universal Serial Bus) port. This Adapter Cable has a data transfer rate of over 250 kbps. Since the adapter uses no IRQs, there are no IRQ conflicts, & 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. [] Download the driver from the Support tab (if applicable). [] Download a PDF with the technical specifications of this product on the Support tab or view the technical specifications of this product on the Specs tab Note: Using this adapter with a Chromebook requires a serial terminal application. This type of application may be downloaded from the Chrome Web Store.