Issues would be the weight if camera, battery & sender receiver for height work.
Good concept though.
If they work at 80' and are light enough-£95 is a bargain considering the cost of the pole.
Can't really see the point in 1st floor windows though.
I think you've misunderstood what these are.
There's no camera etc, its simply pair of glass prisms so that when you look straight ahead, you actually see as if you were looking up. You don't see a 'top-of-the-pole' view, just the same view if you tilted your head upwards.
I think the idea is that it saves your poor neck muscles. They've obviously been invented for rock climbers who can belay their partners without having to gaze straight up all the time.
Good idea I must say, maybe I'll buy some. (the £31 ones, not the £95)