Headphones; headphone consoles; headphone amplifiers; communications headsets; adapter cables for headphones; ear pads for headphones; noise cancelling headphones; telephone headsets; personal headphones for sound transmitting apparatuses; earpieces for remote communication; radio apparatus and instruments; walkie-talkies; sound masking apparatus for speech privacy; helmet communications systems; safety caps; balaclavas for protection against accidents, irradiation and fire; helmet cameras; visors for helmets; helmet camera mounts.
Electrical and Scientific Apparatus