HDView (Hik Series) 16 Channel NVR 16 PoE Ports Switch ONVIF, Support up to 12MP IP Cameras, 2 HDD Slots, UL Listed Certified, Surge Protection Please buy SAME Series of IP camera and NVR, because it's Private Connection. More stable than ONVIF connection. 16 Ch & 16 POE Network Video Recorder, Up to 16-Ch IP cameras input 2 SATA HDD interface up to 6TB each Up to 12MP resolution recording Work with HDView and Hikvision brand cameras