Today's review that I going to focus on the TUNERSYS WS161, The device playing listen 25,000+ free Internet radio stations with 50w x 2 Chanel Smart Integrated Amplifier, Has Bluetooth Receiver, Has headphone out, Aux in ( Line in): 3.5 mm Stereo Jack, DAC Optical / Digital Input to RCA Line out (AUX ouput), has remote online upgrade function, Such a rich function, that are way more specialised in what the device do