C2g 18m usb to serial db25 adapter cable product description this adapter cable enables high speed serial data transfer up to 1152 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 computers or hubs 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