The only compact transmitter designed and built for fitness.  Versatility - best describes this system - Built onto Aeromic, Cyclemic, or E-mic - to be worn as a head worn or armband (headsets must be ordered in appropriate length).   Specially designed O’ring seals, marine grade varnish on the circuit board, sealed push button ‘on/off’ switch - sets this transmitter in a class by itself for fitness use.  An 8 channel frequency agile transmitter and receiver combo give you the flexibility to operate in the toughest wireless areas.