Acoustic amplifiers for mobile devices; Amplifiers; Amplifiers for wireless communications; Apparatus for recording, transmission, processing and reproduction of sound, images or data; Audio-receivers and video-receivers; Audio amplifiers; Batteries; Cases for music, audio and related electronic equipment, namely, cases for audio tuners, audio receivers, amplifiers, tape players, compact disc players, MP3 controllers/players, audio mixers, audio speakers in the nature of music studio monitors...