Using microwave radar to detect alarms, as long as someone stands at the door, the alarm will be triggered1080P high-definition video doorbell camera, 4.3-inch display screen Built in 5000mAh rechargeable battery and 5V 1A USB cable for power supply, with low battery alarm function Stay alarm notification. When someone stays at the door, the camera will capture and record a video, which can be viewed during playback (requires a memory card) One way intercom, can only hear the voice of visitors, cannot communicate with visitors Clear night vision. Provide day and night monitoringPIR motion detection. 120 ° angle, when the cat's eye detects movement, the APP will push notificationsIntelligent playback., Manufacturer: HVSYVVSRL