The U1S2P USB Serial Adapter provides an external plug-and-play serial connection with your computer, let you free up your existing serial port. Users have the capability to utilize the adapter with serial port interface in an easy-to-use environment. The adapter is designed for connections to Cellular phone, PDA, digital cameras, modems, or ISDN terminal adapters through USB port with over 1 Mbps data transfer rate. Installation is easy .Simply plug a serial device into the adapter and plug the USB port into the computer .NO IRQ is needed so there are no IRQ or Com port conflicts. For more details on product, Please refer to http://www.papyrus.co.il/usb_to_two_rs232_adapter_(db9pin_male).htm