leasing of electrical units for playing messages to telephone callers and leasing of electronic systems, namely, announcers and repeaters for providing voice messages and music via telephone lines and/or on premise; retail store services featuring electrical units for playing messages to telephone callers and electronic systems, namely, announcers and repeaters for providing voice messages and music via telephone lines and/or on premise; wholesale distributorships featuring electrical units for playing messages to telephone callers and electronic systems, namely, announcers and repeaters for providing voice messages and music via telephone lines and/or on premise; providing interspersed prerecorded advertising messages and music for others for playing to telephone callers including callers waiting in que; providing in-store advertising messaging for others including interspersed music and voice messaging; and writing and producing audio advertising messages for others, including one or more voice components, delivered via telecommunication means; and preparing advertisements for others by means of commercial voice, audiotext, and interactive voice response systems