With incredible video quality, ease of use, and powerful networking tools, Revo Ultra is the very best that Revo has to offer. Its unique design complements any home or business. The Revo Ultra's superb video quality is based on IP technology. The RU162T6GB6G-4T is a complete, plug and play HD surveillance system with 16 channel NVR, 4TB and 12x Four Megapixel HD Indoor/Outdoor cameras. The REVO ULTRA NVR is powerful featuring state of the art H. 265 Compression and 4K video output. Revo Ultra cameras features optical grade, IR anti reflection glass, massive 4 Megapixel Sensors, double the resolution of standard 1080p. They also come equipped with Smart commercial grade “OSRAM” LEDs. They strongly and evenly illuminate the scene up to an unprecedented 100' in total darkness. Night vision video quality is unmatched. The cameras are built for the outdoors, capable of handling temperatures as hot as 140F and as cold as -31F. S. M. A. R. T. technology enables the system to monitor its own health and alert the user of any malfunction. The polished look and intuitive feel of the Ultra's interface is a joy for everyday use whether you're using the NVR itself, the Mobile App, Computer Software or Browser. Setup is a snap with PoE and Cat 5e cable. One cable carries everything between the Revo Ultra camera and NVR.