An international team has designed the world's smallest hearing aid called Nanoplug. At just 7.1mm x 5.7mm x 4.17mm, it is half the size of other hearing aids and intended to be less intrusive, less noticeable, and less expensive. Nanoplug was conceived by Nevena Zivic and developed with industrial designer Jongha Lee, audio engineer Mladen Stavri and electromechanical engineer Zoran Marinovi. It contains no toxic chemicals or heavy metals and can be programmed via a computer and cable connection.