Internal Host interface: IDC Output interface: Serial Add two RS232 serial ports to any system with an available USB motherboard headerThe ICUSB232INT2 USB to Serial Adapter lets you add 2 RS232 ports to any desktop system that is equipped with an available USB motherboard header. Unlike standard USB to serial cables, this cable is designed for use inside the PC case, affording an entirely internal solution with no mess or extra adapters needed. This compact and simple USB adapter offers a cost-effective solution that bridges the compatibility gap between modern computers and legacy serial peripherals. Backed by a StarTech.com 2-year warranty and free lifetime technical support.The StarTech.com Advantage Ports & interfaces Serial interface type RS-232 Serial ports quantity 2 Output interface Serial Host interface IDC Design Certification Microsoft WHQL, CE, FCC Internal Yes Features Plug and Play Yes Stop bits 1, 2 Data bits 7, 8 FIFO (First In, First Out) 256 B Baud rate 115.2 Kbit/s