) 11 1/2 in, 27 Programmable Channels, 154, No External Channel Select, Battery (3) D, Operating Range Up to 1 Mile, Includes (4) Mounting Tabs, Online Manual, Torx Bit, For Use With VHF Analog Radios, Hi-Visibility Green, Silver.) 11 1/2 in, Length (In.Wireless Intercom 2-Way, Band Type VHF, Material Fiberglass, Stainless Steel, Channels 1, Output Watts 1,500 mW, Width (In.) 9 1/2 in, Height (In.