This adapter cable enables high speed serial data transfer up to 115.2 K between the USB and the traditional RS-232 serial port. Since this adapter uses no IRQs, it is ideal for when you need many serial devices attached to your PC. Just connect your computer's or hub's USB port with a digital camera, modem, ISDN-TA modem, barcode reader, Palm III and V, tablet, label writer, fingerprint verification, security system, POS equipment or any of your favorite serial devices. Connector 1: USB Type A Male Connector 2: DB25 Male Please Note: This product creates a virtual serial port. It is not intended to connect a parallel printer/device to a USB port.