Longsun Acoustic is a leading professional designer and provider of acoustic components: ultrasonic sensor, loudspeaker, dynamic receiver, buzzer, siren and alarms etc, it is a division of LONGSUN Corporation who consists of one sensor factory, two loudspeaker factories and one buzzer factory, with total employees over 2000, more than 40, 000 square meters production areas, all are managed under ISO 9001: 2008 certificated system, meanwhile with our strong R&D team and up-to-date production equipments based in our factory, we provide customers with the high-quality products and efficient service to meet your different requirements. Our goal is to provide best acoustic solutions and zero defect quality products to meet our customer&＃039;s satisfaction and beyond their expectations. Business philosophy: R & D: upgrading technology, creating the requirement, sharing the profit; Quality: mutual cooperation, quality upgrade, customer satisfaction; Service: reasonable price, delivery on time, service in time. We believe our success comes from the trust of our customers!