Person or Vehicle Detection Each camera in this kit captures videos of 38402160 resolution, which is 4 times the clarity of 1080p camera. The cameras of the kit cannot work without the NVR. This dome security camera system features PoE (Power over Ethernet) tech, with only one cable connecting each IP camera to the NVR for both power supply and video signal transmission. With the 2TB HDD and up to 12TB of storage capacity, the PoE video surveillance camera system supports all cameras to record continuously at the same time. Access Your Camera, Anywhere and Anytime via Reolink App or Client. This security camera system can be expanded up to 8-camera kit with Reolink IP camerasFor best compatibility, Reolink cameras are recommended to use with Reolink NVR. IP66 Waterproof Certified.