Emergency Telephone Color Silver Includes Assistance Push Button Emergency Push Button Material Stainless Steel Mounting Location Surface Operating Voltage 24V DC Product Type Emergency Call Boxes Features Real-Time Alarm Reporting Maximum Operating Temperature 131 Degrees F Minimum Operating Temperature -4 Degrees F Overall Depth 8 1/2 in Overall Height 2 3/8 in Overall Width 6 1/2 in Standards FCC CRF 47 Part 15 UL/CSA