Finally Sena launched the 50 series helmet communication intercoms in India and I was the lucky one to receive the first unit in our state. They come in two models, 50S and 50R, and they allow up to six riders to talk at the same time while others can listen in. Smart stuff from Sena. The Sena 50S Mesh 2.0 Intercom brings significant advancements to motorcycle communication. With an exceptional communication network and finelytuned highdefinition speakers.