Up to 64 different zone groups Each zone can be named and assigned Volume control Zone selection Push to talk button « Emergency » mode to broadcast a priority emergency message XLR microphone chassis (supplied) with Phantom power supply USB port to load a chime in mp3 (max. 4 seconds duration) in the internal memory RD port to connect to digital channels 9/10, 11/12 of the matrix Use shielded CAT5e or CAT6 cable with a maximum length of 100m LINK FOR FULL INFORMATION: DZ-MICDESK