A diversity switch combiner for use in systems for receiving wideband signals is arranged to split the received signal into separate channels each carrying a respective frequency band. Members of a community can meet and collaborate over telephones, especially cellular telephones, or computer workstations, in a way that is freeform or prescribed, automatic or moderated, spontaneous or scheduled, unassisted, and selectably anonymous. The strap cover is fastened to the underlying strap via a fastening device. A deflector is provided for covering the slots and the deflector is displaceable with the knife elements to uncover the slots as the knife elements are displaced through the slots and into the passageway.