David, I had never heard of NST but the NTS.com domain is registered by a Hitron email address.
<img src="https://ipvm-uploads.s3.amazonaws.com/uploads/6c33/2428/Screen%20Shot%202017-05-05%20at%202.37.15%20PM.jpg" border="0" alt="" width="500">
<a href="http://eng.hitron.co.kr/" target="_blank">Hitron is a Korean manufacturer</a>, so I am assuming this is an outlet of them to sell direct online.

Looking For Information On NST

I got a sales flyer from <a href="https://www.nst.com/" target="_blank">NST.COM</a>, and I was curious about the generic OEM cameras:<img src="https://ipvm-uploads.s3.amazonaws.com/uploads/c71f/63cf/NSTFlyer.jpg" border="0" alt="Flyer from NST.com" width="800" height="1881" style="max-width: 100%; height: auto;">