Fanvil The FH-S01 SIP ceiling speaker is a versatile and reliable solution for your audio needs. With features like paging, multicasting, broadcasting, and talkback capabilities, this speaker offers top-of-the-line performance. It supports up to 10 multicast zones with prioritization, ensuring seamless audio distribution. Additionally, the FH-S01 utilizes high-intelligibility G.722&Opus codecs for crystal-clear sound. It is also built with SIP 2.0(RFC3261) and related RFC protocols for strong compatibility and scalability. Experience unparalleled audio quality with the FH-S01 SIP ceiling speaker.