"With incredible video quality, ease of use, and powerful networking tools, Reva Ultra is the very best that Reva has to offer. The Reva Ultra's superb video quality is based on IP technology. The “RU1624KBNDL-2 is a complete plug and play HD surveillance system with 16 CH 4K NVR, 4TB & 8x 4K HD Indoor/Outdoor audio capable motorized Turret cameras. The Reva Ultra 2SATA 16CH NVR is powerful featuring state of the art H. 265 compression, up to 4K recording, 4K video output and 4TB video surveillance Grade HDD. The H. 265 indoor/Outdoor audio capable Turret camera feature massive true 4K sensors, 2 times the resolution of 4 Megapixel cameras. The 4K Turret camera come equipped with built-in microphone for audio streaming and recording. The built-in professional grade “OSRAM” LEDs and IR anti reflection glass Strongly illuminate the scene up to an unprecedented 175' in total darkness. The “RUCT2812-4” Turret camera features 4x optical zoom and a 2. 8 to 12mm automatic lens allows convenient adjustment of the field of view (47 to 115 Degree) of the camera. The cameras are built for the outdoors capable of handling temperatures as cold -40 Degree F and as hot as 140. View your Reva Ultra 4K cameras from anywhere. Using the Reva Ultra mobile smartphone app, simply set up an account and then scan your NVRs QR code to begin mobile viewing. Access your Ultra NVR via the web compatible with internet Explorer. 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 Reva. "