The U209-006-2 2-Port USB to DB9 Serial FTDI Adapter Cable (M/M) allows you to connect two 9-pin RS-232 serial peripherals to a device with a USB-A port. Recommended for connecting a modem, digital camera, PDA or ISDN terminal to your computer, laptop or tablet, this cable supports data transfer speeds up to 225 Kbps—basically twice as fast as a built-in serial port. No external power source is required. The compact six-foot cable tucks away in your backpack or laptop bag for use anywhere. The hot-swappable U209-006-2 with built-in FTDI FT232RL chipset offers COM retention. It automatically reassigns the same COM port values to each port in case the cable is disconnected or the system is rebooted. Premium foil and braid shielding delivers reliable, error-free signal quality and protection from EMI/RFI line noise. Molded nickel-plated connectors with gold-plated contacts ensure excellent conductivity. Integral strain relief ensures the cable and connectors last a long time. Works with Windows, Mac and Linux computers.