The RS1 brings the endless choice of internet music to your existing Hifi setup. Controlled using the free UNDOK app you can open up a new world of online radio and popular music streaming services. And if you add in the brand's R-Line range of wireless speakers (sold separately), the RS1 makes it possible to incorporate your current music system into a multi-room audio setup. Super Streaming Simply plug the RS1 into your Hifi using the analogue or digital outputs for a superb sound quality connection. Download the UNDOK App (available on Android and iOS) to your smart device to turn it into an easy-to-use remote control*. You'll have access to millions of songs offered by thousands of free internet radio stations, as well as streaming services such as Spotify (some streaming services require subscription). It's also easy to incorporate your digitally-stored music. Stream your song collection direct from your computer, while the RS1 also has a USB input. So if you have music stored on a USB memory stick, it's simple to plug in and play. Multi-Room Expansion By adding Roberts' brand of R-Line speakers (sold separately), you can bring multi-room music to your current system, be it CD player, iPod or other audio equipment. Play your choice of music (either online content or your current collection) wirelessly through speakers in different rooms in the house. Using the UNDOK app you can adjust playback settings, and even group speakers together to play different music in different rooms. *Please note that you must download this app to set the system up