A:AnswerThank you for your inquiry. This is the Backlight 3S version, which comes with similar features and functionality as the Backlight 3 Lite model. It comes with fisheye camera.
A:AnswerIt might very well work on a 70inch. More of the light might be behind the tv as opposed to be on the sides as ambient screen light. Amount of light saturation is adjustable within the app.
A:AnswerNo. You can control using the app on your phone. Once all is connected the view will recognize the colors on your screen and lights will change as colors on TV change.
A:AnswerIt probably would. Being that it is for much larger TV's you would probably have overlap in the lighting on the back of the tv and thus a much heavier spot of light saturation on the tv that would then not mimic what is on the screen.