I dont know about this system but the plastation one can do the same thing well the new modle that is.in storse they sell a screen that attaatches to playstation.therse two lcd screen and a video
screen. it has speakers in the screen like a t.v. you could play it in the car with the battery adapter or on t.v. or with the playstation at home cannected with ac addapter

"Adventure Vision was considered state-of-the-art in 1983 as it was the only tabletop cartrige-based game system (unless you consider the Vectrex as such as well). Entex's machine required no TV hook-up since the screen was built-in, with 6000 light locations to create images with more than 20 times the resolution of any table-top game on the market at the time. It used four "D" batteries (not included) and came with a Defender game cartridge. Adventure Vision also featured a full fidelity speaker that produced unrivaled sound effects."

Is it a standalone system (only 1-game compatible)or is there several games for it ?