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; walkie-talkies; sound masking apparatus for speech privacy; radio apparatus and instruments; head protection, namely ballistic head protection, ballistic head protection bonnet and ballistic head protection system consist...