This t-shirt has a built-in equalizer in it. Let me repeat that. This t-shirt has a built-in equalizer in it, that responds to outside sound and displays what it's hearing on the front of the shirt. I'm still busy being blown away by this thing. Oh, how I could have used this going to concerts during the 1980s. For those of you about to rock, we salute you ... and recommend this t-shirt. (via Gizmodo)