Emergency Weatherproof Telephone, Color Yellow, Includes Emergency Push Button, Material Plastic, Mounting Location Surface, Operating Voltage Not Applicable, Product Type Emergency Call Boxes, Features (2) Programmable Auxiliary Outputs for Peripheral Equipment Control, Auto Answer, Call Received when Lit LED, Standard or Smart Operation, Telephone Line Powered, Maximum Operating Temperature 140 Degrees F, Minimum Operating Temperature -4 Degrees F, Overall Depth 4 in, Overall Height 9 1/2 in