Provides safe and reliable communication in Class I Division 1 Areas, where ignitable concentrations of flammable gases, vapors or liquids can exist all of the time or some of the time under normal operating conditions. Features: Oversized buttons for gloves-on operation Copper-free cast aluminum housing Temperature range -40C to +60C (-40F to +140F) Heavy-duty industrial handset cord Corrosion and moisture resistant circuitry Intrinsically safe handset Field replaceable handset and fuse Weatherproof Applications: This telephone is designed for use in locations with the highest hazardous area classifications such as: Chemical plants Refineries Aerospace sites Bulk loading stations Mines Drilling rigs Munitions storage areas Offshore platforms Nuclear facilities