This Industrial Master station is a waterproof model designed for humid, dirty and outdoor conditions. The unit can operate in an ambient temperature range from -20o to +50oC (-4oF to +122oF). The station consists of a rugged waterproof and dustproof casing (Ip65) of orange silumin. The front panel is hinged to the back casing to allow easy access during installation and service. The station has screw terminals with labels and the 4 glands allow waterproof and dustproof connection of installation cable and loudspeaker wires.