Kaisheng Technology/Temperament specializes in the R&D and production of audio and video equipment, and it has top-notch electro-acoustic and artistic skills in addition to industry-standard R&D and testing equipment. We support a straightforward design philosophy and strive for realistic playback of sound. Kaisheng Technology/Temperament was developed for users to produce more ideal listening and pleasant body wear.

The only company in China that has consistently devoted itself to the design, development, and production of cutting-edge open flat earplugs is Kaisheng Technology. It has created several timeless works recently, including the BELL-bell series/db.