SBJ-I single-circuit flash alarm is plate structure, LED display, high-brightness, balanced light, good anti-vibration, long life. With sounder, control button and power, form flash alarm system. Circuit use CMOS integrated circuit. Simple structure, reliable working, small power consumption. Usually used with thermal instrument for threshold-crossing alarm. Can be used with other switching capacity for warehouse, doors and windows alarm, when alarming, can produce flash sound alarm signal