Longsun Acoustic is a leading professional manufacturer and provider of acoustic component: ultrasonic sensor, loudspeaker, transducer, telephone receiver and transmitter, buzzer and siren, fire alarm bell etc. With our strong R&D team and up-to-date production equipments based in our factory, we provide customers with high-quality products and efficient service to meet your different requirements. We regard customer satisfaction and high quality as our missions, our success comes from trust of our customers. Business belief: R & D: Upgrading Technology, Creating the Requirement, Sharing the Profit; Quality: Mutual Cooperation, Quality Upgrade, Customer Satisfaction; Service: Reasonabl ... more