Microphones; Apparatus for recording, transmission or reproduction of sound; Apparatus for recording, transmission or reproduction of sound and images; Apparatus for recording, transmission, processing and reproduction of sound, images or data; Apparatus for recording, transmitting and reproducing sound and images; Apparatus for wireless transmission of acoustic information; Audio-receivers and video-receivers; Audio and video receivers; Audio switching apparatus; Audio- and video-receivers; Closed circuit TV systems for security and surveillance, namely, cameras, switchers, monitors, microphones, and recorders; Distribution amplifiers for audio and video signals; Electronic switchers for audio and video signals; High definition multimedia interface splitters; Home networking modules comprising electronic components being electric cabling panels, voice and data boards and video splitters and associated wiring; KVM switches; Matrix switchers for audio and video signals; Signal splitters for electronic apparatus; Wireless routers; Wireless transmitters and receivers