At the Tomorrowland music festival, which took place in Belgium over two weekends in July, R.F.I.D. wristbands replaced admission tickets and also provided a way for the 60,000 daily attendees to connect with one another. Prior to the event, festivalgoers registered their wristbands online and linked them to their Facebook accounts. At the event, if two people near each other pressed the heart-shaped button on their wristbands at the same time, each person's Facebook name was stored in the cloud and then sent in an email to the other person. So each attendee received a daily email of anyone they had met throughout the day. Organizers also illuminated the lights on the bracelets in coordination with some of the musical acts.