I brought one of these so I could play the music on my phone through my hi-fi. It's ok easy to set up. What you must remember is the quality of the sound depends on the source. I tried this with different cables I first used RCA to RCA. And then 3/4 Jack to RCA supplied. I can't say there was much difference. The only advantage I can see with this is my phone is not tethered to my hi-fi with a cable. On the advertising it says there is a graffic equaliser. It's just a bass bust. But there maybe something different that I haven't found yet. So as a basic piece of kit it's ok. Ho it's not very big it's just over 2x2 inches