Telephone Overall Depth 4 in Overall Height 12 in Overall Width 9 3/4 in Volume Control Yes Indoor/Outdoor Usage Outdoor Standards CSA Certified FCC TCB Industry Canada 10124041A Number of Lines 1 Mounting Location Wall Enclosure Material Plastic Enclosure Rating NEMA 3R Includes Enclosure Yes Facility Type Commercial Maximum Operating Temperature 140 Degrees F Minimum Operating Temperature -40 Degrees F Color Yellow