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Product Description
ART. 3111
3000 Series full base "4+1" audio-phone incorporating an adjustable electronic call tone, "door open" push button and spare service button.
For use on traditional "4+1" audio systems that require an electronic call tone including the following audio kits: 4K series, 8K series, VR4K series and VR120DK series kits.
Call tone adjustment: 3 level (low, medium and high) call tone switch.
