I recently installed a standalone, 16 Channel DVR that is basically a generic no name brand. It is listed as a model number DVR4016. Inside the menus, it has an area for Firmware Upgrade, so it seems that there would be something out there to support this. Inside the unit is a sticker that simply is stated as follows: 
  
 
  
The unit I have supports 16 cameras and 2 2TB Hard Drives (which I have totally out at 4TB, and 16 cameras) which I purchased on EBAY, which may have been a mistake, but for the most part has been working very well. 
  
I have a couple issues with the unit, and a wishlist item: 
  
1.) When searching for video, but advance 1 hour. (Example: if I want to search from 09:30 to 10:00, then I must enter 10:30 to 11:00 
2.) Motion detection area seems to pick up motion outside the defined area. My manual says to high light the area to monitor, but that seems opposite. Every time a car passes my house I get a motion detect email. 
3.) Wish List item, would like to see built in NTP service to be able to connect to automatically set the clock on a scheduled basis. 
  
See attachment for images. 
  
  
  
  
  
  
  
Any assistance or advise would be highly appreaciated.