Google Chromecast Audio: Stream your favorite music with Google Chromecast Audio. Simply plug into your speaker's auxiliary input and connect to your Wi-Fi network. Then just tap the Cast button from your favorite apps on your phone, tablet or computer to cast songs, radio stations and podcasts to your speaker.
Works great to cast audio from any device: Android or Apple iOS phone or tablet, Mac or PC. Best way to switch multiple devices through my main speaker system. One trick I learned is to plug my headset into the Chromecast Audio - requires a 5v micro usb power source. Especially like the ability to adjust volume control from my casting device.