The sudden activation startles unwanted visitors but also provides safe entrance and room lighting for your family and guests. We were very impressed with the performance of this device in our tests. The sensor is quite sensitive, very quick to light and we experienced no false activations. An excellent way to add automatic light to dark closets and cabinets; makes a great night light for safer navigation without producing constant light - especially helpful during power outages. Effective range within 3m radius, 20-second auto-off.
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