– Compatible with any telephone system with standard DC message waiting voltages ranging from 90VDC to 120 VDC
– Fully modular for quick plug-in installation by non-telephone personnel
– Unit’s LED will blink at a steady rate when the message waiting voltage is detected.
– Flickers when the phone rings
– Attractive styling
– Easy retrofit mounting
– Works with nearly all message waiting voltages
– Not compatible with any AT&T phone system