It can connect to your wi-fi router wirelessly. You can monitor (handheld, including smartphones, android tablets) and one- or two-way intercom with noise reduction (visitors viewing, video calls, snapshots, recordings, etc. ). The system function menu is located in the console of the mobile application instead of the exhibition inside the building. ). At the same time, the large 4.3" LCD screen allows you or your family to see the door clearly and sharply. (Pir detection and wide angle 100° ) Using 1080P 100° wide angle lens camera, automatic switching of day/night vision sensitivity (adjustable; Distance is about 3-4 meters), LCD TFT color display, suitable for AHD images and videos. Easily maximize home security with a clear view of the door. (One-way intercom provides convenience) When someone at the doorbell triggers the pir and the app receives notifications and you can check the live preview, see who is at the door and hear what the guest is saying. But the guy can't hear what you're saying. Because the door camera is so mini that you cannot install the speaker. (Long-term control durable battery and applications ) The built-in high-capacity 5000 mAh battery supports 30 days long standby time (usually 3-5 calls per day), low battery reminder and USB port charging. This digital viewfinder supports both iOS and Android, download the Smart Life app to get every detail of what’s happening every day in your front door anytime, anywhere. Never miss a visitor or prevent theft, strangers or voyeurs. (Tf card or cloud storage ) Supports max. 128G TF( card Does not include) for local recording or event. Package Contents: - Door camera monitor - USB cable charging - no need to remove the monitor to charge the battery - Back plate - Screws - User manual