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GAI-Tronics 256-001SK Standard Keypad Outdoor Industrial Telephone with Spring Door Return, High-Impact, Glass Reinforced, Polyester Housing, Extreme Operating Temperature Range: NEMA 3R Weatherproof Rating: Sealed Metallic Braille Keypad: Anti-Corrosive Enclosure: Non-Moveable Hookswitch: Volume control handset: Noise canceling microphone: 6' Hytrel® cord: 40°C (-40°F) to +60°C(+140°F): Polyester Housing (256001SK 256-001 256001-SK 256-001S)