4 High Resolution 800+ TVL IP66 Heavy-Duty Metal Weatherproof Cameras for Excellent Video Quality and Clarity.24 IR LEDs that automatically activate when they detect low lighting conditions.They can see up to 20 meters (about 65 feet) away, make sure to take advantage of Motion Detection and Scheduled recordings in conjunction with Night Vision to have complete control over the protection of all that you care about.View and Record in Widescreen with Remote Viewing on iPhone, iPad, and Android devices (with included Amcrest Link app).Pre-Installed 500GB Hard Drive (expandable up to 3 TB) for 6 Days of Continuous Recording at Highest Resolution., Longer Recording Times Up to 30+ Days Available with Use of Motion Detection and/or Lower Resolution Settings.USB backup feature for peace of mind, IP66 heavy-duty metal indoor/outdoor heavy duty metal weatherproof cameras, and powerful IR-LED night vision.