REVO"s professional 16-channel high definition surveillance system is perfect for small to large homes and businesses. Unlike other HD systems, REVO"s new HD system is very user friendly. The HD NVR supports plug and play functionality and automatic network detection/settings that will result in a system that is quick and easy to set up. REVO"s HD NVR has some intelligent features including EZLINK, Push notifications to most smartphones, email notification with attached video clip or jpeg image, and video blind. The 2 Megapixel cameras provide super crisp and clear video images while the ultra-bright 23 in. widescreen LED monitor provides a vivid display. The four bullet style die cast metal cameras included in this system are weather resistant (IP66 rated), come equipped with a mounting bracket and can see up to 120 FT in total darkness. 100 ft. of CAT5e cable is included with each camera. You"ll never have to worry about how to get power to your cameras with this system because it has a built-in 8 CH POE(Power Over Ethernet) switch. REVO EZLINK will automatically network your NVR on most routers. In Fact, REVO"s advanced PENTAPLEX technology maximizes the DVR by allowing you to view live video/record/search/playback/back up and access the NVR Remotely, All at the Same Time! The massive 4TB Hard Disk Drive (system is upgradeable to an 8TB HDD as well) allows for months video storage capacity, depending on your settings. Advanced. Intelligent. Video Surveillance. REVO!