For Montreal’s C2MTL—Commerce & Creativity conference in May, Connect & Go created badges embedded with U.H.F. tags. Unlike N.F.C., which is intended for very close communication, U.H.F. tags can be read from as far away as 30 feet. As the 4,000 attendees passed through the main entrance, U.H.F. readers embedded in the gates instantly read their badges and alerted security personnel with either a green or red light to indicate whether they were approved to enter. Organizers also hung three U.H.F. “chandeliers” on the show floor. The devices could read attendee activity within a 30- by 30-foot zone, tracking when people arrived, how much time they spent in the area, and who else was there. Organizers received real-time information on tablets, so they could make adjustments as necessary, for example to ensure the most heavily trafficked food stations had enough staff and products.