Get a sharp and crisp image day or night with the camera’s automatic IR-cut filter. Up to 100ft night vision. IP 66 weatherproof housing, cameras can be used indoors and outdoors. Installed 1 TB hard drive within NVR device, replaceable up to 4 TB capacity , note that this is not Battery Powered Cameras, don’t mean can use the system without sny Cables, have to Connect them to the Power Adaptors for Supply Power to Camera and NVR, no need Video Cables. Be notified when there are unexpected movements. Smart notifications with image will be pushed to your smartphone via iPhone/Android App, the app lets you see all of your cameras in one place.