4K UHD has a resolution of 3840 x 2160 (8MP), which is four times higher than 1080p Full HD. Compared to 5MP/4MP Super HD, 4K offers a significant advantage. The 8MP surveillance system provides you with the finest details, even when you enlarge the images with digital zoom. The infrared LEDs in each 8MP surveillance camera emit invisible light up to 30 meters at night, and the advanced 3D-DNR technology reduces noise levels, allowing for clear and uninterrupted night vision. The 8-channel 4K PoE surveillance camera set supports simultaneous live viewing and 24/7 recording from all four bullet cameras. If anything unusual is detected, you will be notified immediately. You can manually adjust the recording mode and motion zone according to your own needs. A complete and intelligent security solution. The NVR system supports other types of Reolink PoE IP cameras and can be expanded to up to 8 channels to cover more desired surveillance areas. Supported PoE IP cameras include: RLC-410, RLC-511, RLC-420, RLC-422, RLC-423, etc. A true plug & play security system. PoE connection (Power over Ethernet) means that only a single cable (up to 100 meters) is responsible for power supply and video signal transmission between the camera and the NVR. Simple wiring - the installation could not be easier for DIY enthusiasts and beginners. Install the 8MP PoE IP cameras anywhere indoors or outdoors. With an IP66 rating, the cameras are protected from the elements such as rain and snow, cold and heat.