IN CEILING FLUSH MOUNT ONE WAY SIP INTERNCOM SPEAKER/ NO MIC 30 WATT SPEAKERGR GSC3506V2 Multicast Paging Speaker The GSC3506 v2 is a multicast paging speaker that provides a powerful paging and public address solution to expand security and communication throughout offices schools hospitals apartments and more. Features 30W high fidelity speaker with HD acoustic chamber Supports SIP paging multicast paging call waiting with priority override and more Supports full band and wide band audio codecs including Opus and G. 722 1x