The CrowdBand is where CrowdSync started, and it's still a go-to for concerts, sporting events, houses of worship, corporate events and fan experiences. Four RGB LEDs light up on cue with the rest of the crowd, from full color washes to moments timed to the music or the game. The soft silicone band offers a universal fit, the face puts your logo front and center, and the 10 to 12 hour battery lasts from doors to the final song.