Great for those who prefer or need a visual alert for phone calls instead of an audio ringer. Dome shape spreads light throughout a room. Strong flashing light signals incoming call. Can be used in analog, digital, and PBX system (Requires +24v signal or greater). Standard RJ-11 phone connection. Easy to install and use. Powered by the phone line, no additional power supply needed. 3.11" x 1.4" x 1.95".
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