Shenzhen e. S. D electroncs co. Ltd is hong kong-based high-tech industrial corporation mainly engaged in the r&d of high-frequency wireless communication products. Currently the corp. Has the manufacturing capacity of mp-3000 mobile phone signal isolator,2.4g microwave video transmitting device, high-frequency switch spacer and automotive electronics total in over 90 kinds,20 series. Its annual sales exceeds hk dollar 50 million. These products are sold in europe, america, africa and australia, etc. Through the agents. Dongdian corporation wins praises from our customers all over the world with its effectiveness and high efficiency. Hereon, dongdian, on behalf of all our employees, extends our sincere tribute to friends and guest from abroad and home. Wish our pleasant cooperation and friendship last forever.