Product Description
Double-power Supply Smoke Detector Alarm
--Advantage: Double-power Supply, that means our smoke detector alarm can be used by hardwired AC 220V-240V 50Hz, at the same tme, with DC 9V alkaline battery back up which will do work when the power cuts out. So it is the big advantage, people don't have to worry at all about you cannot hear the alarm if there's a fire when power cuts out. What's more, the TSS890A-HI can be interconnect other alarms. So that When a fire breaks out in one room, smoke alarms in other rooms sound the same alarm.
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