Viking Electronics Universal Message Waiting Light VK-LM-1A

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