Apparatus for recording, transferring and reproducing sounds or images; headphones not for medical purposes; earphones not for medical purposes; in-ear monitors not for medical purposes; assistive listening devices not for medical purposes

Scientific and technological services, namely, research, development and design in the field of apparatus for recording, transferring and reproducing sound or images, headphones for and not for medical purposes, earphones for and not for medical purposes, in-ear monitors for and not for medical purposes, assistive listening devices for and not for medical purposes, hearing protectors