●Channels automatic in turn detection & display shows detecting message alternatively
●Set measurement range, 2 stages of sound and light alarm
●2 stage on-off value ouput, contact capacity: AC220V, 2A
●On-off value switch off daley time setting 0 - 60 mins
●Accommodate RS-485 communication interface
●Automatic switch between main power & standby power, under low voltage & power off down alrm
●Data storage function, alarm record storage
●Self-checking function
●Protection circuit in the input end
●Comply with national fire fighting reqirement