Can DVR/NVR connect more than one monitor?

The answer is YES. There are two ways to do it.

But please notice that VGA cable can be 15M maximum and HDMI cable can be 10M maximum. If the length is out of range, the video signal is weak and image on monitor has problem such as snow.

Method 1

The DVR has 2 ports to ouput video to a monitor. One is VGA port and another one is HDMI port like picture below.

Therefore, your can get a monitore with VGA port and another one with HDMI port.

Finally, use a VGA cable to plug DVR to monitor with VGA port and use a HDMI cable to plug DVR to monitor with HDMI cable.

You can see image of cameras on both 2 monitors.

Method 2

If your 2 monitors only have VGA port or HDMI port, you can buy a VGA or HDMI spliter like picture below.

Use the spliter and you can connect DVR to 2 monitors with VGA port or HDMI port.