32CH 2U NVR; H.265/H.264; 256Mbps;Up to 20M(5632*4224) recording; 32CH playback, dual 1000M network port, 16CH alarm in, 4CH alarm out; ONVIF2.3; 8 SATA (max 48GB); 4K(3840*2160) HDMI output,Spot Out,Two-way voice talk