The Barix MPI400 Flexa is a PoE-powered intercom and paging device for bidirectional audio and control applications. It provides mono line-level and microphone inputs, including balanced phantom-powered microphone support, plus a selectable speaker or balanced line output. Two digital dry-contact inputs and two relay outputs support call initiation and external control. Network features include SIP, HTTP(S), RTP and multiple audio codecs.