Compatible with any telephone system with standard DC message waiting voltages ranging from 90VDC to 120 VDCFully modular for quick plugin installation by nontelephone personnelUnit's LED will blink at a steady rate when the message waiting voltage is detected.Flickers when the phone ringsAttractive stylingEasy retrofit mountingWorks with nearly all message waiting voltagesNot compatible with any AT&T phone system

• Compatible with any telephone system with standard DC message waiting voltages ranging from 90VDC to 120 VDCFully modular for quick plugin installation by nontelephone personnelUnit's LED will blink at a steady rate when the message waiting voltage is detected.Flickers when the phone ringsAttractive stylingEasy retrofit mountingWorks with nearly all message waiting voltagesNot compatible with any AT&T phone system
• Universal Message Waiting Light
• Dimensions: 6.50x1.75x2.75
• Item Weight: 1.20
• 100% Satisfaction

Compatible with any telephone system with standard DC message waiting voltages ranging from 90VDC to 120 VDCFully modular for quick plugin installation by nontelephone personnelUnit's LED will blink at a steady rate when the message waiting voltage is detected.Flickers when the phone ringsAttractive stylingEasy retrofit mountingWorks with nearly all message waiting voltagesNot compatible with any AT&T phone systemViking Electronics, Inc