Features: Brand new and high quality. 2 port standard RS-232 DB9 male serial port allows to connect to more serial devices. PCI specification 2.2 compliant w/ 32-bit 33MHz host interface. Fast data rates up to 1Mbps. Automatically selects IRQ and I/O address. Supports PCI IRQ sharing-saves valuable resources for other expansion card. Supports PCI-bus power management interface. Supports hot swap and wake-up. Operating System: Windows 98， ME， 2000， 2003， XP， Vista. Support devices: automated teller machine， bar-code reader， digital camera， digitizing tablet， external modem， finger print identification， infra-red transceiver， ISDN T/A， magnetic card reader， PDAs， POS devices， multi-modem dial-up server， etc. Dimensions: 12cm x 12cm x 1.9cm - 4.72inch x 4.72inch x 0.75inch. Package Included: 1 x Dual RS232 DB9 Serial PCI Adapter 1 x Driver CD NO Retail Box. Packed Safely in Bubble Bag.