Audio and video receivers; Headphones; Microphones; Megaphones; Cabinets for loudspeakers; Virtual reality headsets; Ear pads for headphones; Earphones (other than hearing aids for the deaf); Pickup tubes for professional use; Audio amplifiers; Digital audio players; Apparatus for long-distance microphonic monitoring; Headphones for audio apparatus; Anti-dust headsets; Earphones for recording apparatus; Stereo headphones for personal entertainment use; Stereophonic headphones; Covers for headphones; 3D spectacles; Eyeglasses