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Company Products>Weatherproof Telephones PTT Weatherproof JR104h-hSC  Product Introduction  See Big Picture Brief： Weatherproof Telephones PTT Weatherproof JR104-SC Model Number:JR104-SC As a weatherproof telephone, it is fully contained within a corrosion resistant cast aluminium weatherproof case, resulting in a highly reliable product with a long MTBF. Ideal for Metro, Railway, Highway side, Marine, Mining, Tunnels, Steel Plant,Chemical plant,Power plant and related industrial application, etc http://www.jrtelephones.com。