H.264 Video compression, TVIAHDNVRDVR 4-in-1, Support multi-mode switch, AHD TVI: 4CH*1080H, IP: 4720P, Playback resolution: AHD TVI: 1CH 1080H@25FPS, IPC: 4CH 720P@100FPS.AHD TVI: 4CH*1080H(compatible with 720P 960H analog) IP: 4*720P, HDMIVGA output 1024768, 1280*720, 1280102.