?Extendable security system?8 channel DVR connect with FOUR 720P weatherproof cameras to optimize your surveillance system. You can add 4 more analog cameras and 2 extra 960P IPCs. ?Advanced H.264+ compression? Recording continuously for 1200 hours with a 1TB HDD on normal conditions, however, H.264 takes 4TB HDD to achieve 1200 hours long video. With the provided compression me ?Intelligent motion detection email alert with images? Smart playback available with customizable searching area (needs an internal hard disk drive, it can't record or playback without hard drive, ple ?Quick remote access?The camera can be accessed and controlled remotely to your whole surveillance via the APP on your mobile devices. Review and watch live videos from every corner of the world. ?Worry-Free Warranty?All ANNKE products have passed CE & FCC, HDMI Senior Member certified and ISO 9001 certified. Easy-to-reach lifetime telephone and email support, 2-year warranty and 60-day money