Our detector is a great household necessity to protect your families' safety, and it is also perfect for using in factory, school, bank, workshop, hotel and so on. It is highly sensitive with high stability, very easy to install with included screws. when the smoke leakage occurs, the red indicator will flash and remind you, accompanying with a loud alarming sound, to ensure personal safety. It is operated by 3pcs AA batteries, energy-saving and simple to use. Such a practical detector, worth bu