We are a manufacture in china mainland,established in 1997 and have more than 20years produce experience.Our main products are Speaker unit,alarm buzzer,piezo element and ultrasonic sensor.Speaker:piezo tweeter,mylar speaker,loudspeaker,tweeter speaker,TV speaker,car speaker,multimedia speaker,woofer,sub-woofer,waterproof speaker etcBuzzer: piezoelectric (piezo) vibration element,piezoelectric buzzer,magnetic buzzer,SMD buzzerUltrasonic sensor: for car parking system or distance tester we have 185 staffs,especially including 18 acoustic engineers, we provide products customization service, offer free sample for test. we are focus on product innovation, Management innovation. The quality of product was recognized by customer from all over the world.