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Established in 1990, Zhongshan Expert Electronics co.,ltd specializes in R&D, manufacture and marketing of wireless doorbells , energy-saving lamps, auto. and solar generation system. As founder of wireless doorbells, we enjoy the longest producing history and an experienced technologist team including our General Manager. We had more than 20 years focus at wireless technology. Besides, we are the first doorbell factory approved by ISO 9001 in China. our brand name "EXPERT", a pronoun of wireless digital do...
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