Smart Video Doorbell HD WiFi Doorbell Wireless Operated Motion Detector Home Intercom HD Night Vision Security Door Doorbell+Chime (Battery Not Include) Feature: Longer standby: Doorbell powered by 3pcs 18650 batteries (Not include).The batteries can last around 3 to 4 months between recharges with normal use (5-min events a day). Live View: Up to 30 hours Easy to set up the Video doorbell in the App: Youll never miss anyone or any thing.Get instant phone alerts when visitor are at your front door or contact the built-in motion PIR sensors.Talk and see your visitors through your smartphone,Compatible With iOS and Android Devices PIR Motion Detection:When someone presses the doorbell, a notification will appear on your mobile phone. You can the door remotely using the app anywhere. Communicate directly through your device Real-time Two-way Audio: The Video Doorbell is equipped with a Passive Infrared Radiation sensor, detecting the slightest motion at the entrance.Phone alerts you when visitors are at your front door. Hear and speak to people at your door from your mobile device with built-in microphone and speakers 166-Degree Wide Angle Lens: Use the app to get the full 166-degree view of your front porch. See your visitors clearly and effortlessly Smart Night Vision: Switch to night mode on your app, the light sensor on the doorbell will provide a clear view in the dark of night 2.4GHz Wi-Fi Compatible:The 2.4GHz Wi-Fi range of Video Doorbell is up to 20m (66ft), it easily connects to your homes Wi-Fi network, sending live video feed to your phone. You can see and talk to the visitor from the comforts of your bed, from work, or while on vacation Enjoy together you video doorbell with your family: Monitor and shar-e to 4 devices. Up to 4 users may view the video feed, but onl-y 1 user can use the direct intercom Product parameters: Material: ABS Sensor: CMOS OV9732 Chipset: Hisilicon 3518 Battery Capacity: Rechargeable 18650 battery 3000mah x3( Not included) Features: PIR Motion Detection,Notification Push to Mobile Device,Two-way Audio Video Resolution: 720p HD Video WIFI:2.4GHZ (does not support 5G) Lens: 130 degrees horizontal, 166 degrees DIAGONA-L Infrared lamp: 6x850 night vision infrared lamps Dingdong machine specification: US plug Cloud storage: free 3-day recycling Doorbell machine size: 5.65x2.93x1.28 inch Dingdong machine size:3.42x1.81 inch Package size:22.5x10.6x8.5cm/8.86x4.17x3.34 inch Gross weight:340g/0.75 lb The Package Include: 1 x Video Doorbell 1 x Dingdong machine 1 x Installation tool 1 x User Manual