Elite Screens M84UWH 84" 16:9 projection screen - projection screens (2014 mm, 69 mm, 1304 mm, 6.3 kg, Black)

Does it come with mounting brackets ? Or do we have to buy them to install it on a wall ?

can this be used in front of a window? Is is elimination of light penetration good enough for that?

Can I mount this recessed in the ceiling?

Does the screen come with all the mounting hardware?Or do we have to buy any additional hardware(brackets n screws) I am interested in 16:9 120inch