Considered robust and practical, one of the most unique elements of Doble's design was that the steam ... The valve, in turn, is controlled by a cam, which leads to the engine working on both ...

It was a more complex design, though the concept ... and another area to direct the steam from the device's water valve downward. The engine's water boiled, and the cooled water was applied ...

That’s a huge discount versus the original Legion Go design (and others), putting it within striking distance of Valve’s own Steam Deck despite coming with newer and more powerful hardware.