Shidu product has got lots of praise since it came to sell, it was rated as leading firm by educational circles in China, with the ability of two millions products per year Shidu is the largest manufacturer of voice amplifier in China, it has got numbers of technical patent, and promote many criterion of this industry. Shidu takes ‘Innovation changes future’ as a concept, takes ‘Quality, Value,Perfect,Dream’ as a core values to supply worthy products and services for the customers.

To be a leading brand , SHIDU has gather 10 years’ experience. It now has got numbers of technical patent, impeccable sales system online and traditional channel and highly public praise.According to the statistics of voice amplifier class, SHIDU  is true first brand of voice amplifier.