With incredible video quality, ease of use, and powerful networking tools, Revo Ultra is the very best that Revo has to offer. Enjoy additional professional and premium-residential features with Revo Ultra Plus™. The Revo Ultra's superb video quality is based on IP technology. The “RUP161BNDL-17” is a complete plug and play HD surveillance system with 16 CH Professional Grade NVR, 4TB & 16x 4MP HD Indoor/outdoor Motorized Audio Capable Turret Cameras. Revo Ultra Plus™ NVRs feature state of the art 4K Video Output, H.265 Compression, support up to 12MP Cameras and up to an astounding 32TB of Hard Drive Capacity (4TB Pre-installed). The Cameras feature IR anti reflection glass, professional grade “OSRAM” LEDs, massive 2K Sensors, double the resolution of standard 1080p. The “OSRAM” LEDs strongly illuminate the scene up to an unprecedented 100’ in total darkness. All 8 cameras come equipped with a built-in microphone for audio streaming and recording. The cameras are built for the outdoors capable of handling temperatures as hot as 140F and as cold as -40F. The “RUCB36-1A” bullet camera features a 3.6mm fixed lens for wide field of view coverage. The “RUCT2812-1” Turret Camera features 4X optical Zoom and a 2.8 to 12mm automatic lens allows convenient adjustment of the field of view of the camera. 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.