Skully is the greatest possible badge.
Backlit amber leds show a simulated flame pattern, making it look like the skull is on fire from behind, reflecting onto your clothing if worn. An accelerometer ensures the flames always originate at the bottom, no matter how the badge is oriented.
It also monitors the overall acceleration of the badge and will slowly die down the flames over the course of about a minute and go into a very low-power sleep mode if the badge doesn't look like it's moving at all and will reactivate if you start moving again.
Skully does not go on a lanyard but rather has a bar pin on the back, so it can be worn as a largish lapel pin in relatively normal social environments. It's roughly 2.3 x 2.3 inches (about 60 x 60 mm). It is powered by a CR2032 coin cell to keep it light and comfortable to wear.
It is really nice to look at even if when it's not turned on. The flames look best indoors and/or in low light environments such as a futuristic nightclub.
It's difficult to fully capture the beauty of this badge in photos/video, it looks much better in person IMO.
"Your badge is my most treasured from this year's con" — someone on twitter
"It's really kickass" — someone on twitter
"This is a thing of beauty" — someone on twitter
"WHAT. HOW DO. WANT." — someone on twitter
Fully-assembled wearable badge, including battery.
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