Algo 8186 SIP Paging Speaker and IP Loud Ringer Multiple SIP Registrations for Voice Paging or Notification SIP Page & Zoned Multicast Stream, Zoned Multicast Receive, SIP Loud Ringer Alert Mounts to Wall or 2 Gang Weatherproof Electrical Box (not included) Requires PoE - IEEE 802.3af Class 0 / Max 12.95W - Idle nominal 2.0W High Volume Audio Output at 110 dBA 1m/1W (1 kHz)