【H.265+ 8CH 2K NVR/6pcs 3MP Waterproof WiFi camera】--This is expandable camera system,it provides you the flexibility to extend additional cameras.You can add more 2pcs 3MP cameras.But only Support ZOSI WiFi Cameras(Model:ZG1883M),With 3MP HD Resolution Cameras, you can get a sharp and crisp image day or night..【Smart Light and Sound Alarm】--This camera is alert and ready to react to any potential danger via smart light and sound alarm system - triggered by human motion events or controlled manually to keep troubles away.smart notifications with snapshots will be pushed to your smartphone via App.Supports setting the detection area, which greatly reduces the false alert..【View from anywhere anytime】--setup with ZOSI Smart App and scan QR code to access real image on phone. Check in on your home or business wherever you have an internet connection. Free app for live view & Playback on smart devices with Wi-Fi or 2G/3G/4G anywhere anytime..【Talk and listen just like never leave home】-- Built-in mic and speaker let you stay in touch with your household. Check in with the family or tell your dog to stop barking, or say hello through the ZOSI Smart App..【Noted】--The cameras and the NVR require the power connection. They are not Battery Cameras.Wireless security cameras connect wirelessly to a NVR. They are designed for continuous recording,which requires them to be plugged in to a power source.