DESC: Are you looking for an easy way to add self-powered serial devices to your computer, POS solution, or manufacturing application? StarTech.com's PCI2S650PW provides 2 high-performance serial ports that can be configured to deliver 5 or 12 volts of power to compatible devices. For additional flexibility, this card can be used in PCI (5 volt) or PCI-X (3.3 volt) expansion slots and supports Windows (including 64-bit editions) and Linux environments.