The mighty 1979 "Radofin Colour TV Game" (note the British spelling on the box) with 10 glorious bat'n'ball games presets!
I don't think the term "games console" had been invented and a colour one back then was downright upmarket.
This isn't my one, but I've got one just like it and it still works. Its best feature is that the motion of the square "ball" and bats is perfectly smooth due to it being locked to vsync at 50Hz UK PAL. Oh they knew something about computer animation back then, lol.
It's actually a battery only device, so at the time, I drilled a hole in the side and put a power socket there, then ran it off an adapter.
Alas, my one doesn't have the box any more, so this is a better example.