... audio inputs 1 channel spot output with multi split display DH-DVR0404HF-A: Full D1 recording, 4 channel video inputs, 4 ... . It can support HDMI, VGA, USB2.0 and 2 HDDs.DH-DVR0804HF-A: Full D1 recording, 8 channel video inputs, 8 ... . It can support HDMI, VGA, USB2.0 and 2 HDDs.DH-DVR1604HF-A: Full D1 recording, 16 channel video inputs, 4 ...