Multi-Room Music allows you to play your tunes or talk radio (woo!) simultaneously across a variety of Echo devices on the same network. It works like a Sonos system, pumping audio to individual speakers throughout a house. Or, you can place several speakers around a really big room that’s covered by the same network, a technique often used by gyms, studios, or other large spaces. Basically, wherever you are in the house, Slayer can be there, too.