Here is a cool wearable device that lets you express yourself at concerts and festivals. The O’tatmo Lightband is an interactive LED device with RGB LEDs and a proximity sensor. You can close/open your hand to turn the light off/on. Double clap to change the color or make a single click to change light pattern.
More gadgets like this: here
The Lightband has up to 8 hours of battery life. It weighs only 48 grams. Expected to ship in July 2017.
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