See the Review: http://www.stereo.net.au/reviews/review-ieast-soundstream-pro-streamer Creates a magic audio system for you. A good alternative to Sonos Connect Products as well as Chromcast Audio Access to music resources Music streaming With the iEAST Play application, you can stream music from 1) Cellphone memory; 2) USB flash driver and USB mobile HDD; 3) Home NAS network; 4) External analog audio Source input to SoundStream/StreamAmp and re-transmitted to other room by multi-room control; 5) Popular online music services of millions of songs and thousands of radio stations, such as Spotify, Qobuz, Tidal, Pandora, vTuner, Napster, TuneIn, iHeartRadio etc.. (note: the online service availability varies by regions) This gives you a totally different experience without turning on computers in traditional way. Audio system control Control all your music with your smartphone, tablets Free iEAST Play applications for Android, iPhone, iPad and Mac let you comfortably control your audio system from the palm of your hand. Download the iEAST Play application of iOS version from App Store and Android version from Google Play. Multi-room control 1) Play the same song in every room in perfect sync. If you have multiple speakers that connect to SoundStream/StreamAmp, You can easily group the devices and stream the same song to all rooms in perfect synchronization. 2) Stream different songs to every room, at the same time You can tune into a radio station in kitchen, play a song from online music service to bedroom, stream local music from cellphone memory to living room in simultaneous way. Other amazing features Multi-zone control You can group different devices to different zones, each zone can play different songs. Choose channels You can choose left channel, right channel and stereo mode on the application, which can make you Preset content Six buttons to preset playlists or radio stations, you can play the preset contents using the remote controller, even not necessary to open the application on you smartphone. Sleep timer You can set the time on the application to turn off the streaming automatically in case you fall asleep or you only want to listen to music for certain time. This also makes your life more energy-saving. Alarm clock Set the alarm to wake up your favorite music or radio station automatically in one room or all rooms. Firmware upgrade New features and music services automatically delivered for free iEAST Play application will automatically notify you If there is new firmware with new features and music services. Globally, you can freely upgrade your firmware to the latest version. You only have to click one button, the system will update itself, and you will see on-screen prompts and hear voice prompts.