You would also need a smart-phone or -pad, to run the Sonos app to control the Sonos Connect. But it would be cheapest to buy only the 3.5mm->RCA(cinch) stereo cord and just plug the -phone or -pad straight into the HiFi, and run the Deezer app on it! Less fun, plus who wants to be tethered, and taking phone calls while playing is a bear -- but it’s cheep-cheep. (Or, if you already have an Apple brand -phone or -pad, then a used Apple Airport Express and AirPlay-ing to that, might be cheaper than the used Connect too. But £50 is a pretty good price, and the Connect and the Sonos app will be more versatile.) If cost is an extreme issue, bear in mind that Sonos will only work if you subscribe to Deezer Premium+ or Deezer HiFi.