Emergency Weatherproof Telephone, Color Silver, Includes 12-Button Braille Keypad, Emergency Push Button, Material Stainless Steel, Mounting Location Surface, Operating Voltage Not Applicable, Product Type Emergency Call Boxes, Features (2) Programmable Auxiliary Outputs for Peripheral Equipment Control, Auto Answer, Telephone Line Powered, Maximum Operating Temperature 140 Degrees F, Minimum Operating Temperature -4 Degrees F, Overall Depth 2 3/8 in, Overall Height 12 in, Overall Width 10 in