Telephone Entry System Color Silver Stainless Steel Number of Lines 8 Ringer Yes Mounting Type Flush Height 13 1/4 in Width 12 in Depth 3 1/4 in Volume Control Yes Power 18 V AC 20 VA Voltage 16 V AC Output Rating 20 VA @ 16 V AC 50 VA @ 16 V AC Operating Temp Range 10 Degrees to 145 Degrees F Requires DKS Cellular Subscription IM Server Modem Subscription Internet Connection Includes 16 VAC 20 VA Power Transformer