Scientific, electrical, measuring, signalling and checking (supervision) apparatus and instruments; apparatus and instruments, all for the recording, reproduction, transmission, broadcast and receiving of audio and visual signals; printed circuit boards, cables, plugs, connectors, couplings, sockets and switches, all being electric; tapes, discs, cassettes and cartridges, all for the recording of audio and visual signals; power supply units comprising transformers and rectifiers; batteries and battery boxes; cases for optical and electronic apparatus; parts and fittings for all the aforesaid goods; all included in Class 9.;