Consulting and professional services for individuals and companies, excluding any activity that is prohibited or requires specific authorization. Professional consulting and health services for individuals and companies, excluding any activity that is prohibited or requires specific authorization. Rehabilitation and medical-professional evaluation of individuals with hearing problems, administration of hearing tests and/or specific tests, treatment of hearing problems, purchase, sale, application and installation of medical devices or specific devices. Manufacturing, wholesale and retail trade, also through home sales or assistance, door-to-door, as well as technical assistance and design, of acoustic devices and aids of all types, of equipment for the hearing impaired; of laryngophones, surgical irons and prostheses, sanitary components and electromedical instruments, otochirurgical, scientific, electronic, electromechanical and electrotechnical instruments, hearing protectors and noise protection systems, as well as personal protective devices (e.g. noise plugs, swimming plugs, etc.); of electromedical and sanitary instrumentation for healthcare professionals and non-professionals; of didactic instruments; acoustic technical and installation consulting, as well as installation work related to the electromedical sector; throughout Switzerland and abroad.