Bring the convenience of multi room audio to your existing equipment, the Roberts RS1 connects to your Hi-Fi systems with either a digital optical connection or a 3.5mm input. Once you have connected the RS1 you can now access Spotify, Internet Radio & music on your own network plus it can all be controlled by the UNDOK application, which is compatible with both i OS & Android. You can also join all of your R-Line equipment together into a Multi-Room group of music.