Electrical, electronic, signal and monitoring instruments, namely, instruments for receiving, transmitting and reproducing audio signals, namely, audio receivers and audio transmitters; high-frequency receivers, high-frequency input modules, instruments for recording and reproducing sound signals, namely, tape recorders and digital storage recorders; instruments for wireless transmission of acoustic information, namely, wireless microphone transmitters, plug-in microphone wireless transmitters, plug-in wireless microphone receivers; data media programmed for use in the transmission and reception of signals in the form of diskettes, tapes and discs; software, namely, floppy discs, tapes, discs, all for electroacoustic purposes; computer software for controlling, tuning, monitoring and demonstrating signal transmission on CD ROMs, disks, tapes, DVDs; identifiable guide systems comprised of sound signal receivers, audio transmitters and headphones for providing verbal information in single or multiple language format; instruments for broadcasting, transmitting and receiving sound signals or video signals, namely, high-frequency sound transmission instruments and sound transmission engineering instruments, namely, pocket transmitters and pocket receivers, for the UHF and VHF ranges; diversity audio receivers, small audio receivers; live news coverage instruments, namely, broad band transmitters with command audio receivers, backward channel transmitters, diversity program audio receivers and command radio transmitters; antennae; instruments for narrow-band and broadband systems in sound transmission engineering; transmitters, namely, multi-channel radio transmitters and single-channel radio transmitters and infrared radio transmitters, receivers, namely, multi-channel, single-channel and two-channel radio receivers; headphone radio receivers; chin-strap radio receivers and parts thereof; instruments for sound transmission and sound reproduction, namely, infrared and high-frequency audio transmitters and audio mono-receivers, stereo audio receivers, two-channel audio receivers, and chin-strap audio receivers, connectors for listening and speaking devices, namely, adapters; conference and interpretation systems comprised of analog and digital transmitters of audio signals, video signals and data signals; instruments for communications engineering systems, namely, communication headsets and headphones for use in conferences and simultaneous translations for use in all areas of telecommunications, airlines and air traffic control, news reporting and military communications; microphones, namely, dynamic microphones, condenser microphones, electret microphones, headset microphones, gooseneck microphones, directional tube microphones, wireless microphones, clip-on microphones, microphones with integrated transmitters, namely, condenser microphones with built-in high-frequency transmitters, soloist microphones, pressure microphones, switchable microphones, interface microphones and parts thereof, namely, microphone modules effected through computer aided acoustic design and laser interferometry techniques, microphone diaphragma, capsules, omni-directional microphone electret capsules, omni-directional foil electret capsules, microphone terminal distributors, microphone sleeves for protection of wind, sweat and spit; electroacoustic transducers, namely, headphones, dynamic headphones, electrostatic headphones, wireless headphones, headphones for use in aircraft, buses and trains, namely, with infrared transmission or high-frequency transmission, headphones with active noise compensation, loud speakers, parts and accessories for electroacoustic transducers and headphones, namely, ear pads, volume controls, amplifiers, namely, high-end and tube amplifiers, battery plugs, battery charges, cable connectors, co-axial cables, electric adaptor cables, electrical cables, fiber optic cables, speech therapy apparatus, namely, wireless transmission apparatus for hearing impaired persons, consisting of personal sound amplifiers, stethoset receivers, dynamic headphones for sever hearing impairments, dynamic headphones for use with audiometers.

Medical technical apparatus for electro acoustic purposes, namely, receivers for use with hearing aids for hearing impaired persons; audiological apparatus and instruments, namely, electric hearing aids, hearing amplifiers, and electrically operated hearing aids.