How Concert LED Wristbands Work | WSJ Tech Behind
4 months ago
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[{"text":"Whether it's Taylor Swift's Eras Tour, Coldplay's World Tour or a BTS K-Pop show, light-up wristbands or light sticks have become\u00a0..."}]
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{"title":"How Concert LED Wristbands Work | WSJ Tech Behind by The Wall Street Journal 1,236,375 views 4 months ago 5 minutes, 29 seconds","duration":"5 minutes, 29 seconds"}