... : auto zone status supervision, auto equipment (All equipments include controller, amplifier, microphone & loudspeaker) management & status supervision & ... could provide overall control over this voice alarm controller. The software and the voice alarm status ... AC ~ 260V, 50/60Hz, <10ADC Power Supply24V DC, ±20%, <2ALine InputDistortion<1%, 1KHzFrequency Response50Hz~16KHzSensitivity775mVImpedance10KΩ ...