Ningbo East Electronics Ltd. was established as one of the earliest sino-foreign joint venture enterprises in China at 1980, and began to produce piezo buzzer and transducer at 1987. With 32 years manufacturing and service experience, we are the largest professional manufacturer of piezo buzzer and siren in China. Ningbo East’s plant occupies an area of 36,000 square meters and the annual sales approaches 60 million sets. High quality and reliability are guaranteed under strict execution of the certificated quality management systems. The spot failure of majority products is below 50 PPM.