Ringdown Telephone, Zone 1/21, Curly Cord, Guardian Telecom, Mfr#: DTR-51-Z

Ringdown 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 Curly, Includes Ring Detect Relay