Feature: 1. HD Large Screen: 4.3in high definition LCD large screen, camera with 1080P resolution, 120 degree wide viewing angle, can check visitors outside the door at any time. 2. Two Way Audio: After the APP is connected, video calls and remote intercoms can be made through the mobile phone, and there is no need to worry about safety outside. 3. Motion Detection: Infrared detection sensor, when a suspicious person wanders around outside the door, it will automatically record and save the video, and the mobile app has infrared alarm message to prevent theft. 4. Night Vision: When the corridor is not well lit, it will automatically switch to the night vision function, which can record clearly in the dark environment. 5. Wide Application: Aluminum alloy camera housing, impact resistant. Suitable for families, apartments, office buildings, hotels, etc., iron doors, wooden doors, security doors, glass wooden doors, etc. can be installed. Specification: Item Type: Wireless peephole doorbell Material: Aluminum alloy, ABS Operation APP: For YCC365 Plus LCD Size: 4.3 inches Display Resolution: 1080p Via Mobile: For Android, for IOS Viewing Angle: 120° Motion Detection: Support PIR WIFI Mode: 802.11 b/g/n Input/Output: Built in microphone, two way audio Night Visibility: With infrared light, night vision up to 1-3 meters/ 3.28-9.84feet Storage: Cloud storage and memory card (excluded, maximum 128G) Battery: 5000mAh lithium battery x 1 (included), charged via USB (5V, 1A) User Accounts: 4 users in total (Administrative Users and Shared Users) Support Door Thickness: 35-120mm/1.38-4.72in Applicable Door Hole Diameter: 14-50mm/0.55-1.97in Camera Size: 75x66mm/2.95-2.6in Screen Size: 137x85x21mm/5.39x3.35x0.83in Uses: Suitable for families, apartments, office buildings, hotels, etc., suitable for iron doors, wooden doors, antitheft doors, glass wooden doors, etc.. Package List: 1 x Monitor1 x Doorbell1 x Bracket1 x USB cable8 x Screw2 x Gasket1 x Manual Note: If you have any security applications installed on your phone/tablet that may affect for YCC365 Plus APP, be sure to grant it the proper permissions. (Please make sure your phone/tablet is connected to your WIFI router and supports 2.4G)