Apple Airport Express, which contains an audio out (which I hook to my stereo to synch playing music in multiple parts of the house) and does synchronized strea

Apple Airport Express, which contains an audio out (which I hook to my stereo to synch playing music in multiple parts of the house) and does synchronized streaming, made it to the market one year (2004) before Sonos's first product did (2005). Apple later remove the WiFi extender and added a speaker and renamed the product appropriately, but it is and evolution of the same pre-Sonos technology and probably is why they aren't trying to sue Apple.