Amplifiers being audio apparatus; Computer network routers; Computer networking apparatus; Home automation hubs; Analogue to digital audio converters; Digital telecommunications apparatus; Digital televisions; Data security apparatus; Installations (electric or electronic) for use in security; Apparatus for controlling lighting; Apparatus for lighting control; Computer controlled apparatus for furnishing voice responses to data inputs; Apparatus for use in security control; Computer controlled installations of video display apparatus; Control amplifiers; Control apparatus for audio signals