Intelligent : is an intelligent doorbell device that allows users to monitor the situation at the entrance in real-time through a built-in camera and transmit the video to smart devices such as smartphones.Bidirectional Dudio communication: Through bidirectional audio communication, when someone rings the doorbell, the allows users to have a remote conversation with the person at the door through an intelligent device, thereby achieving remote doorbell response.Night Vision and Remote Ringing: The is equipped with night vision function, usually equipped with infrared LED lights or other night vision devices, which can clear vision in low light environments, allowing users to check the situation at the entrance at any time. In addition, the also includes a remote ringtone that can be used to alert users and allow to respond and operate through smart devices when someone rings the doorbell.[How to matching] 1. Scan the QR code in the doorbell manual with your phone, download and install the doorbell matching application for pairing. 2. You need to that your phone and are on the same 2.4G WI-FI network and the instructions in the doorbell manual; 3. Press the doorbell for 10 seconds until a voice prompt appears, then pair and set it in the mobile application.[How to Install] 1. Open the back cover and install three AAA batteries; 2. Use the double-sided tape or screws provided in the packaging to secure the back cover to the door; 3. Use the screws inside the packaging to secure the body and back cover of the . (AAA batteries are not included in the packaging).Power Suplly:3xAAA batteries(Not included batteries)Colour:BlackMaterial:plasticPackage Contents:1 * doorbell1 * Chinese and English manualOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.