fernesto

I have been searching the internets looking for what the hell this thing is really called. It is a small box that you can wire lights into, and it has a microphone on it and as it picks up the bass from music it makes the lights flash/strobe/pulse with the music.

I know there are such devices because my friend has one but there is no name on it.

WHAT IS IT CALLED, AND GIVE ME A WEBSITE THAT SELLS THEM!!!!!!