... : AC220V ±10% 50 HzOutput voltage: DC24VDisplay : 7 inches color LCD touch screen, 800 x 480 resolutionHandle: ARM7The sampling precision: 15 bit ADSignal ... record, covered by circle type storage.Alarm way : first alarm more than 90 dB alarm way;second alarm more than 120 dBControl the output ... :1 bus relay output, any way alarm when the relay and off.1-8 road relay output ...