Industrial Telephone, Outdoor Telephone, Explosion Proof Telephone manufacturer / supplier in China, offering Fully Enclosed IP68 Waterproof Industrial Telephone Die-Cast Aluminum, 110 dB Loud Ringer, Anti-Corrosion for Outdoor Harsh Environments, IP68 Waterproof Industrial Telephone Aluminum Alloy Die-Cast, Noise Cancelling, Weatherproof for Chemical Plants, Tunnels & Outdoor Sites, IP Telephone Intercom System PBX Center Room Dispatch Console and so on.