Feature: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 night2.4GHz Wi-Fi Compatible:The 2.4GHz Wi-Fi range of Video Doorbell is up to 20m (66ft), it easily connects to your home’s 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 vacationEnjoy 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 intercomProduct parameters:Material: ABSSensor: CMOS OV9732Chipset: Hisilicon 3518Battery Capacity: Rechargeable 18650 battery 3000mah x3( Not included)Features: PIR Motion Detection,Notification Push to Mobile Device,Two-way AudioVideo Resolution: 720p HD VideoWIFI:2.4GHZ (does not support 5G)Lens: 130 degrees horizontal, 166 degrees DIAGONA-LInfrared lamp: 6x850 night vision infrared lampsDingdong machine specification: US plugCloud storage: free 3-day recyclingDoorbell machine size: 5.65x2.93x1.28 inchDingdong machine size:3.42x1.81 inchPackage size:22.5x10.6x8.5cm/8.86x4.17x3.34 inchGross weight:340g/0.75 lbThe Package Include:1 x Video Doorbell1 x Dingdong machine1 x Installation tool1 x User Manual