This is the SoundWire free version. SoundWire lets you stream any music or audio ("what you hear now") from your Windows or Linux PC to your Android mobile devices. Use it as: - A remote speaker or wireless headphones - A way to listen to music and movies from your computer anywhere around your house, or further over cell networks - A wireless extension of live audio from your PC-based music system SoundWire does audio mirroring (audio cast). You can use any music player on your PC or laptop