Pocket sized TV’s were really cool to have at the time. Other entertainment choices on the go would be portable tape players, portable CD players, game boy, or have a book or magazine. All these items have been replaced by the modern smart phone.
This TV Features a 2.7 inch color LCD. Has an electronic TV tuner with on screen display. The same model was also sold at Radio Shack as a Realistic Pocketvision 24. Powered by 4x AA Batteries or a 6V DC power plug. This allowed you to watch free analog over the air TV anywhere you got signal. Sadly, we now we use digital signal for TV, so this little TV only works with composite AV input.
Sources:
https://www.radiomuseum.org/r/casio_lcd_pocket_color_televis.html
https://archive.org/details/manual_TV1400_SM_CASIO_EN/mode/2up