Earphones; Jukeboxes; Audio cassette and CD players; Audio speakers for automobiles; CD players; Cellular telephone apparatuses; Liquid crystal display (LCD) projectors; Loudspeakers, headphones, microphones and CD players; MP3 players; Personal stereos; Portable sound reproducing apparatus; Software as a Medical Device (SaMD), downloadable, for detecting interrupted breathing during sleep and alerting the sleeper; Software as a Medical Device (SaMD), recorded, for diagnosing balance disorder...