Telephone Overall Depth 5 1/2 in Speakerphone Yes Overall Height 10 3/4 in Overall Width 9 1/2 in Volume Control Yes Standards ATEX-Zone 1 CE Number of Lines 1 Mounting Location Surface Wall Enclosure Material Plastic Maximum Operating Temperature 140 Degrees F Minimum Operating Temperature -22 Degrees F Color Black Resistance Properties Corrosion Resistant Features Removable Handset Retainer Latches on Cradle Cord Type Armored Includes Ring Detect Relay