They utilize the industry's finest noise-cancelling 3-channel silent disco headphones. Our model is 3-channels, and it includes multi-colored LED lights which change colors based on the channel to which the user is listening. You are able to "see" what others are hearing and, by looking out into the crowd, know right away who's playing the hottest tune right this moment! Is it Red, Green, or Blue? Everyone is their own light show.