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-11 is a complete plug and play HD surveillance system with 16 CH Professional Grade NVR, 4TB & 8x 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 HDD Capacity (4TB Pre-installed). The RUCT2812-1 Turret Camera features 4X optical Zoom, IR anti reflection glass, massive 4 Megapixel Sensors, double the resolution of standard 1080p. The 2.8 to 12mm automatic lens allows convenient adjustment of the field of view of the camera. They also come equipped with professional grade OSRAM LEDs. They strongly illuminate the scene up to an unprecedented 150' in total darkness. The RUCT2812-1 has 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 RUCT2812-1 steps up its weather resistant with an IP67 rating. 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..