With incredible video quality ease of use and powerful networking tools Revo Ultra is the very best that Revo has to offer. The Revo Ultra s superb video quality is based on IP technology. The RU82AB4K-2T is a complete plug & play Smart HD surveillance system with 8 CH 4K Smart NVR 2TB & 6x 4K HD Indoor/outdoor Bullet Cameras. The REVO ULTRA 8CH NVR is powerful featuring state of the art H.265 Compression up to 4K Recording 4K video output and 2TB Video Surveillance Grade HDD. The H.265 Indoor/Outdoor Bullet cameras feature massive True 4K Sensors 2 times the resolution of 4 Megapixel Cameras. The built-in Professional Grade OSRAM� LEDs and IR anti reflection glass strongly illuminate the scene up to an unprecedented 100™ in total darkness. The Bullet Cameras feature a 4mm lens which provides an 80 degree angle of view. The cameras are built for the outdoors capable of handling temperatures as cold -40 °F and as hot as 140. View your Revo Ultra 4K cameras from anywhere. Using the Revo Ultra Mobile smartphone app simply set up an account and then scan your NVRs QR code to begin mobile viewing. Pre-event recording includes video before motion is detected providing valuable context leading up to the incident. Experience Peace of Mind with the ultimate high resolution IP technology from Revo.