This is a National NV-100 portable VHS VCR from the early 80s. The NV-100 would of been made to be used with the National WVP-50N camera. When it comes to portable VHS units, these NV-100s are the most common as I've seen a lot of them on Ebay and had a few of them myself with the external tuner and power source. The NV-100s I had, a couple of them were functional but only briefly until they presented their faults which I didn't know how to fix. I ended up giving them all to Cavions in the end.