Shenzhen Yahui Tech. Co., Ltd. is high-tech enterprise specialized in R&D and production of wireless electronic products and intelligent products. Its main products covers wireless calling system, wireless transceiver module and remote controller, wireless remote switch, wireless alarm system, call recorder and intercom system etc. The company, was founded in March, 1998 and it is located in Shenzhen, an opened-up city in southern . It is a technological enterprise born following the developing requirements of modern automation technology. The company possesses comprehensive technical development teams of structure, electronics, software etc. and powerful development and production capacity for electronic products.