We has our primary customer base in the heavy industrial market, having manufactured products for the extreme environments of these facilities for over 6 years. Customers in the power, subway, steel plant,army, chemical, petrochemical, power and pulp and paper industries have installed ours systems to address their operational communication and system supervision needs. A major feature of these systems is that, regardless of facility size, our systems can meet the customer&＃039;s specific needs, dampproof, antisepticise, dustproof, fireproof, anti-jamming, through basic intercom, duplex intercom, or telephone-type communication. Other system attributes include the capability of interfacing with existing equipment and the flexibility to accommodate future expansions. The benefit most noted by customers is a significant reduction in maintenance costs because our systems function for years, even decades, without requiring service or repair. Our panding customer: over 80% of China&＃039;s subway are using our products, in Shenzhen, Shanghai, Guangzhou, dalian, tainjin, chongqin, etc. China Three Gorges water power plant; China petroleum & chemical corporation, etc.