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Xiaomi Smart Doorbell 3 Color:Black HERO 16K is our mostXiaomi Smart Doorbell 3 24 hour smart motion detections Automatic video recording of movements and notification to your phoneEquipped with human body sensor and AI human shape recognition technology, Xiaomi Smart Doorbell 3 monitors abnormal movements of your doorway, and sends notifications to your smartphone once they are detected. Two way audio communication Smart voice changerPeace of mind even when home aloneWhen someone rings the doorbell, you