Electronic video multiplexer; Telecommunications apparatus; Wireless transmitters; Wall mountings adapted for television monitors; Video monitors; Digital sound processors; Set-top boxes (digital signal receivers); Audio amplifiers; Audio switching apparatus; Sound transmitting apparatus; Electric monitoring apparatus; Audio and video receivers; Audio players; Apparatus for the transmission of sound or images; Cables for optical signal transmission; Cables for electronic transmission; Data transmission cables; Video screens; Analogue to digital audio converters; Computer peripheral devices