Check the listing for details. Viking electronics PA-250-IP 250 Watt Sip Multicast Paging Unit. Condition: New. Listed at 873.10 USD. SIP compliant SIP endpoint or multicast group member SIP/Multicast: SIP page, SIP page and zoned multicast receive Plays audio from standard multicast sources Compatible with Polycom multicast paging Red “Page/Status” LED indicator Network downloadable firmware Support for access code to prevent unwanted SIP calls Network remote volume control Paging prioritization Programmable pre-page alert tone Powerful 70V amplifier drives up to 250 Watt load Door chime trigger input Auxiliary and background music inputs Individual and master volume controls Bass and treble controls LEDs show audio level and activity Provides loud ringing 600 Ohm output to drive additional amplifiers Adjustable Automatic Level Control Peak limiter and multiple protection modes