Headphones; Assistive listening device not for medical purposes; Audio headphones; Consumer electronic products, namely, audio amplifiers, audio speakers, audio receivers, electrical audio and speaker cables and connectors, audio decoders, video decoders, speakers, power conversion devices, power converters, and power inverters; Earphones and headphones; Handheld electronic units for adjusting sound levels in hearing aids; Personal headphones for sound transmitting apparatuses; Sound amplifie...