4 Channel HD-SDI DVR 4-ch video&4-ch audio input, 2 SATA interfaces(No HDD), 1080P@30fps live view and playback. Apps: IVMS-4500, Guarding Expert H.264 video compression 4-ch synchronous playback Special for HD-SDI cameras HDMI and VGA output at up to 19201080P resolution 19201080P resolution real-time recording