... compression 4,1CH simulation BNC/VGA video out 4CH digital video input 4CH 720P recording NVR H, ... 264 NVR standalone1, 4CH digital video input,4CH 720P recording 2, adopt standard ... H.264 compression 3, 1CH simulation BNC/VGA video output, 1CH audio input, 4, support audio ... .264 NVR standalone/ 4CH digital video input 4CH 720P recording NVR 4CH digital video input 4CH 720P recording NVR ...