LED Indicator with Self-Test Function: A short flash of the LED indicates the operating status of the smoke detector.
TEST Button: The smoke detector's function can be tested at any time using the TEST button.
Early Warning System: The smoke detector provides an early warning when the battery is low.
The product arrived from China in a small package, with all the instructions in Chinese and no European standards. This is unacceptable for such an important safety product and shouldn't be sold by a website I trusted. Ultimately, it's far too expensive for what it is!
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