The Yealink VC series with this demo kit. The kit includes the Yealink VC400 video conferencing system with codec, camera, speakerphone and remote. The systemâ multipoint control unit can host four-way conference calls, with HD video and content sharing, and the ability to view participants and content across dual monitors. Test out the system and all of these essential features for a full 30 days. The demo kit arrives in a durable metal case for storing and transporting the components.