With the PDX20 digital to analogue converter, you get the power to integrate your computer into standard analogue audio systems. The converter has a high quality stereo-audio-codec with USB interface and is equipped with a female RCA input that terminates in a male USB port.Can be used in two ways:If you want to record from an audio device such as a CD player, Tuner or Pre- Amplifier onto a computer, simply connect the output on these devices to the computer and set the Selector to “In”. The included software ensures that you can easily make and edit your recordings. If you want to play files from your computer, connect the PDX20 to the RCA input on your amplifier to the USB connection on the computer and set the Selector to “Out”. Compact, lightweight design!