Holion is the market leader for the design, development, manufacture and the marketing of Intelligent Guestroom Energy Saving & Control System. Since 1997, we have been leading the industry by having a professional and experienced R&D department. We are the only company that has 3 kinds of bus modes: RS485, CANBUS, TCP/IP in our Intelligent Guestroom Energy Saving & Control System in China,Holion is a high tech manufacturer with ISO 9001...
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