... channels,8 channels,16 channels. 1080P*4CH HD-SDI 4CH DVR CE, UL listed HD-3104DVideo Input/Output: BNC 4CH In ... Fps (NTSC); 1920x1080 with 100 Fps (PAL) Preview resolution: 1920x1080( NTSC ), 1920x1080 ( PAL ); Playback resolution: 4x1080PHexaplex operation simultaneously: Preview, recording, playback, and ... , 2 SATA HD, HDMI, VGA, USB Backup, USB Mouse HD DVR FULL D1