The Cheng Juan Technology Co., Ltd. is continually improving the product process & structure, and obtaining competition high quality . Our products are more easy to install, use, design hi-performance. 　In these years, we specialize develop Hi-power ...

We have over 9 years exprience in manufacturing flight case, aluminum truss system and professional audio equipment, now we are the leading company this industry China.We Golden Sound loacated Hongkong, with center Guangzhou China. Our rigid products ...

Longsun Acoustic is a leading professional designer and provider of acoustic components: ultrasonic sensor, dynamic speakers, telephone mobile receiver, buzzer, siren alarm bell etc. With our strong R&D team up-to-date production equipments based in ...