GW Security HD IP 16 Channel NVR Security System with 12 IP PoE 1080P Security Cameras, 3 TB HDD Full 1080P Realtime Recording 16 Channel NVR with (12) 1080P 2.0 Megapixel POE IP Cameras Power over Ethernet setup is clean and simple with a single network cable, built-P2P service and support ONVIF agreement and QR Code Scan Free mobile apps allow you to watch your system from anywhere with mobile viewing for Smartphones, tablets, PC, and Macs Features Wide Dynamic Range & 3D DNR giving you ability to see clearly in contrast lighting environment and sharper monitoring and playback Pre-installed 3TB Hard Drive with 1 Year Warranty and Free Life Time Tech Support From U.S.A.