Most enterprises have resorted to the Internet to take care of business; however, once the Internet got disconnected due to problems of power, the enterprises may suffer enormous lose and damage. While corporations are much more dependent upon the Internet, the reliability of network cannot be guaranteed from failure-proof. Viewing this, the world-leading PCM launches the series of King Pro to deliver mighty output power. King Pro is endowed with strong accommodation to net, and it will not contaminate net; in addition, King Pro is efficient at dealing with various complexity of loading so that it can ensure that the large-sized network and critical conducting appliances are operating with constancy, security, and stability.