HONGKONG KOON TECHNOLOGY LTD is a leader in the research and development, manufacture and sales of Industrial series telephone products.Our Major products are Special Industrial telephone: Waterproof telephone, Loud speaker weatherproof telephone, Bank telephone, Tunnel emergency telephone, Elevator telephone, Prison telephone, etc. Applicable for Subway, Railway, Highway call box, Tunnel, Power plant, Petrochemicals factory, Mining, Dockside, iron & steel factory,bank system,etc.