These T-shirts are so geeky they're cool. Or so cool they're geeky. Or something.
LED Graphic Equaliser T-shirt
This sound-activated LED t-shirt contains a built-in graphic equalizer. Now you can geek out while you rock out!
This is the ever-popular Wi-Fi. This garment actually lights up when it detects a Wi-Fi network.
The stronger the signal is, the more bars on the shirt light up.