... and remote backup 4SATA Detailed Product Description 4ch H.264 HD SDI DVR 1080P realtime playing, recording,playback BNC,VGA,HDMI video ... operation Video Compression H.264 Audio Compression ADPCM Recording Mode Manual ,Timing ,Alarm,Motion de-tection Search Mode By time, ... / 4 Recording Speed 30 f/s(Adjustable) Recording Storage Local HD ,Network Local Playback 1 channel playback Alarm Input 4 switch ...