"Sentinel lets you keep a constant watch on your property from anywhere in the world via the internet with this high-tech system. You can even view video on a smart phone with 3G or higher technology. Record Record up to 2 years of video on the DVR's 500 GB hard drive, thanks to its revolutionary H.264 compression, which saves up to 50 storage space, compared to MPEG-4. Camera qty. 8, Cable Length ft. 65, Channels qty. 8, Indoor/Outdoor Use Indoor/outdoor, Programmable Yes, Remote Included Yes, Motion Activated Yes, Night Vision Yes, Resolution 480 TV lines, View ft. 75, Product Style DVR/monitoring kit, Product Type System. The system includes indoor/outdoor weatherproof cameras that provide 480 lines of resolution Cameras are equipped with night vision for around-the-clock monitoring DVR records in DVD-quality 704 x 480 pixels Each camera offers clear night vision up to 75 feet and can be programmed to record continuously, on a schedule or motion-activated User-friendly coaching menu will make it easy to set up the system to your needs Compatible with Internet Explorer and Safari search engines Works with iPhone, BlackBerry, Android, Windows Mobile and Symbian smartphones"