6 balanced XLR inputs with sensitivity controls.3 band equaliser on each input.600 ohm telephone/priority input provides emergency VOX override of all other channels.4 tone chime local and remote operation.19 rack mount kit supplied as standard.Switchable Phantom Power on each input.5 Local speaker selectors (70v/100v output only).24 Volt DC battery operation.Speaker Select; 6 speaker selector switches are provided to enable you to select 5 speakers individually or totally.Muting For Priority: CH1, 2, CHIME and TELEPHONE have priority to the others signal. (overrides all music modules and channels 3, 4, 5 and 6)Telephone In-out/Music-On Hold: To connect with the telephone system, the function of Telephone input and music-on Hold are provided.