Electric, electronic and optical measuring, signaling and checking/supervision apparatus and instruments included in this class, in particular electric apparatus and instruments for electro-acoustics and parts therefore, namely, ultrasonic transproducers, ultrasonic arrays, amplifiers, and modulators; apparatus and instruments for recording and reproduction of audio signals and parts thereof, included in this class; radio transmitters, receiving apparatus, in particular high frequency audio receivers, high frequency input modules for providing sound balance, apparatus for recording and reproduction of electric signals, in particular sound signals, namely, microphones, dynamic microphones, condenser microphones, electret microphones, head strap microphones, swan-neck microphones, directional tube microphones, wireless microphones, plug-in microphones; apparatus for the wireless transmission of acoustic signals and information, namely, wireless microphone transmitters, plug-in microphone receivers; data carriers containing programs and software, in the field of electro-acoustics on floppy discs, tapes, and discs; electro-acoustic and visual identifiable guide systems, namely, multi-lingual guide systems, consisting of transmitters and receivers, in particular sound signal receivers and headphones, namely, electro-acoustic headphones, dynamic headphones, electrostatic headphones, wireless headphones, headphones for use in airplanes, busses and trains with infra-red transmission, and headphones with active noise compensation; apparatus for sending, transmitting and receiving sound or video signals, in particular high frequency sound transmitting apparatus and sound transmitting technology apparatus, such as transmitting devices, in particular pocket transmitters and receivers, namely, pocket UHF and VHF transmitters and receivers and parts therefore, diversity receivers, small handsets, spot recording apparatus, in particular wide band transmitters with command receivers, return channel transmitters, diversity program receivers, command transmitters, and aerials; apparatus for narrow band and wide band systems in sound transmitting technology, transmitters, in particular multichannel transmitters and single channel transmitters and double-channel receivers; head sets for use with telephones and computers, chin strap receivers as parts of these goods; apparatus for sound transmission and reproduction apparatus, namely, infra-red and high frequency transmitters and receivers, in particular mono, stereo, double-channel and chin strap receivers, hearing and speech attachments, namely headphones and microphones and combinations thereof, conference installations, namely, handheld transmitters supplied with lavalier clips and stand mounts, receivers, antenna mounts, microphones and loudspeakers; apparatus for analogue and digital transmission of sound, video and images, software for the aforesaid systems for control, tuning and checking of the apparatus, apparatus and instruments for conferencing and telecommunications technology, namely, flight safety, reporting and military communications, namely, transmitters for communication installations, diversity receivers, small handsets, ear clips, head aerials, bayonet nut connector, double sockets, coaxial cables, NABNC adapters, room aerials; microphones with integrated transmitters, in particular condenser microphones with in-built high frequency transmitters, microphone modules, solo microphones, pressure microphones, two-way switch microphones, interfacial microphone modules, interfacial microphones, microphone capsules; microphone isolating distributors, transformers, microphone cases, electro-acoustic transformers, in particular headphones, headphones for use in airplanes, buses and trains, in particular with infra-red or high frequency transmission, head-phones with active noise compensation, loudspeakers; parts and fittings for electro-acoustic transformers and headphones, namely ear pads, volume controls, amplifiers, in particular, high end and thermionic amplifiers, accumulator contacts, socket charging apparatus, namely, quick-charging accumulators, power supply units for charging apparatus and automatic charging apparatus, namely manual and shoulder-strap transmitters for communications installations; handset cables

Technical medical apparatus, namely, hearing amplifiers, transmission and reproduction apparatus for deaf and partially deaf people, namely, assisting listening devices, namely amplifiers, hearing amplifiers, audiology technology apparatus and instruments, namely, electrical hearing aids, electrically operated hearing aids, speech therapy apparatus, namely, infrared transmitters and receivers for the deaf and hard of hearing

Providing of telecommunications connections for a worldwide computer network; operation and rental of telecommunication facilities, providing e-mail services; telecommunication routing services; providing electronic telecommunication connection services; rental of telecommunication apparatus, namely, telephones and facsimile machines; analog and digital transmission of audio and video and data-signals