Electronic Wireless Doorbell Smart Dingdong Smart Home Video Doorbell Camera Wifi Super loud doorbell Build a wireless doorbell (loudly ding-dong) ?Add loud doorbell, you will hear a loud ding-dong sound, and you will also receive push messages from your mobile phone. Product Description 1. Support 2.4G Wi-Fi connection. 2. Use 3pcs 18650 specification batteries. 3. Million HD pixels collocated with 166 degree wide-angle lens. 4. Support mobile phone remote fast wake up device within 1-3 second. 5. High quality two-way talk with noise cancellation 6. Support PIR motion detection, when someone hovers at the door, immediately alerts push notifications to the mobile phone. 7. Day and night mode automatic switching, whether day or night, the image is clearly visible, for your safety and family security. Support mobile phone real-time monitoring when it detects someone approaching, it will remind you through a message or phone.