Sold by Radio Shack for $319.95 for use as a computer monitor or with a portable VCR.
During the 1980s lots of people had portable TVs in their RVs and Kitchens, but most of those were the cheaper black and white TVs. It has is a Color CRT, and could be powered by 10x D batteries, AC, or 12V.
This TV has an analog TV Tuner which no longer works, but there are RF and Composite inputs for video games, VCR, camcorders, and more.
Sources:
http://nerdlypleasures.blogspot.com/2017/04/the-realistic-portavision-portable.html
https://www.radioshackcatalogs.com/flipbook/1985_radioshack_catalog.html (Page 104 – 5 1/2″ AC/DC Color TV/Video Monitor)