I installed this and works as a night call, loud ringtone for a business phone (VoiP) and multicast paging. This is only 1 unit. Easy to set up. I love that it can be powered by PoE or 12V DC and can also drive a speaker. So easy! A mini headset cable from the PA2 recording port to the RCA jack and input to an external amplifier will give you 95% of what you want. I will buy more of these in the future. I see about a dozen uses for them.
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