Shanghai Zhongchangjiang Telecommunication Technology Co. Ltd is one of the subsidiary companies of Wenzhou Changjiang Automobile Electronic System Co. Ltd.(http://www.cncaea.cn). It is located in Pudong New District, Shanghai, China with an area of 40,000m2. It specializes in R&D, production and sales of radiation free headsets and offers safe healthy mobile phone solutions with an annual capacity of 30 million pieces.

Our Changjiang Radiation Free Earphone utilizes patented technology which is recommended by American International Collaborative on Health and Environment (CHE)and American EMR Policy Institute (Check Oct.1,2009 statement). Our product is scientifically proved to be the most effective way to reduce cell phone radiation.

The WHO/IARC has classified radiofrequency electromagnetic fields as possibly carcinogenic to humans (Group 2B), based on an increased risk for glioma, associated with wireless phone use. ( http://www.iarc.fr )  We hope our technology and product can help people get protected from RF EMF.


PCT Patent  
German Patent
Chinese Invention Patent
Test Report from National Testing Center
FCC & CE certificates
QS9000/1SO9001