No useless gadget, this. If you like some indicator of how good the party is going besides, say, how much the neighbors complain or how soon the cops show up, this LED will change display based on how much sound it detects. Put on the Al Green for a a little tete-a-tete and you get "Romantic Party". Spin up the "Classic House Hits" and you may see the "Dance Party". Throw on the ... gabber techno on the surround sound system with a hundred of your closest friends and maybe you'll make it to Club or Mega Party! [Engadget Article]