"The Garmin GHS 11 Wired VHF Radio Handset allows full function of your compatible VHF radio from a remote location. There are no complex components, just a streamlined design with soft-press keys, a 2"" dot-matrix display, and a coiled cable that stretches from about 1' to nearly 5'. A rotary/push knob for volume adjustment, squelch, and channel selection makes it easy to use, along with a dedicated button for access to channels 16/9. All buttons and knobs resemble those of the standard VHF radio. The GHS 11 adds a microphone with intercom capabilities when connected to a speaker, giving you ultimate communication versatility. Allows full VHF radio functionality from a remote location Streamlined design Soft-press keys 2"" dot-matrix display Coiled, stretch cable Rotary/push knob for volume, squelch, and channel selection Dedicated button for channels 16/9 Microphone with intercom ability"