What about wireless microphones?

What about wireless microphones? 1200 800 SOS - Save our Spectrum

Wacken 2016: According to the organisers, the festival was attended by 75,000 paying visitors as well as 9,500 other participants like performers, technical personnel, stagehands, media representatives, VIPs, paramedics, security and public officials. Photograph: Rolf Klatt / source: http://www.wacken.com Festival visitors consider good mobile reception very important: Only this way can the experience be shared…