VG-2 is a device the police use to tell if you have a radar detector turned on. THese are used in states where detectors are ilegal, such as VA and Washington DC. If you are not traveling in these states or operating a commercial vehicle, then there is no worries. If you need more information on VG-2 please visit www.whistlergroup.com and check on the radar FAQ page.
DARK/VG-2 Button - Reduces illumination of display
to "dim" or "dark" settings. Press and hold (for two seconds)
to engage or disengage VG-2."
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