Entertainment and instruction services; the rental and hire of entertainment facilities; provision of audio entertainment; sound system rental and hire services; sound rcording rental and hire services; headphone set rental and hire services; the provision for rental or hire of sound systems, sound recordings for said sound systems; radios; sound systems; sound reproducing apparatus; combined AM/FM radio and cassette apparatus; headphones; all other electronic and electrical entertainment systems and devices, for sound and/or vision reproduction, sterilization services, including and sterilization of elements of a sound system or the like