I bet you will be disappointed with its astronomy application. It's just a monocular IR projector NV (don't be fooled by its 2x"objectives" in the front). I doubt it has any image stacking a true EAA rig would use. Also, its 4" HD screen (not 4K) is actually the single elongated magnifying lens size above the smaller low contrast TFT screen. As it's designed by China kids, the PD (pupillary distance) of its mono-lens is typically smaller than the regular adult's :) Expect unpleasant 3D distortions. Finally, $220 off Amazon is too much for this toy. Should be around $100 for what it is. Prob. due to tariffs, though.