Features 1、SMART PEEPHOLE VIEWER: DD1 enables wireless connection to WiFi routers. Monitor and interact with visitors via handheld devices like smartphones and for Android tablets with noise reduction one way or two way intercom. App controls system functions, suitable for homes, apartments, villas, hotels, or offices. 2、MOBILE SHARING SUPPORT: Set up smart peephole by scanning QR code on the app after pressing the reset button for a few seconds. Follow voice prompts to complete setup. Avoid long WiFi SSID with special characters or Chinese, as it may affect successful connection speed. 3、LANGUAGE SUPPORT: DD1 supports English and Chinese languages, with distributed network voice prompts. Language selection available in the app, adjust according to your country for proper language setting. 4、HD SCREEN: 2.8 inch LCD screen with 320x240 resolution and night vision function. Catch and store up to 100 photos with loop coverage. Red infrared lights for clear night vision up to approximately 3 meters. 5、USER FRIENDLY DESIGN: Easy installation with included screws suitable for door thickness ranging from 35mm to 120mm. Battery operated with 4 AAA batteries (not included), providing 90 degree viewing angle and functions as a doorbell. Specification Item Type: Smart Doorbell Camera Material: ABS Mode: DD1 Screen Resolution: 320x240 Pixels: 0.3MP Screen Size: 2.8 inch LCD screen Storage: Built in Infrared Lights: 2pcs 850nm Peephole Aperture: Approx. 14 to 22mm / 0.55 to 0.87in Door Thickness Requirement: Approx. 35 to 120mm / 1.38 to 4.72in Night Vision: Infrared night vision approx. 3 meters / 9.84ft Memory Size: Approx. store 100 photos, loop coverage Function: Supports photo taking Battery: 4 x AAA (batteries not included) Peephole Viewing Angle: 90 degrees Operating Temperature: -20 to 55℃ Monitoring: Able to view outdoor situation at any time Doorbell: With doorbell function Package List 1 x Display 1 x Peephole 4 x Mounting Screws 1 x User Manual