A:AnswerYes you can mount it on the ceiling, using any 4 leg or 3 leg mount having diagonal span of approx. 14 inches. M4 screws need to be used . You need to go to settings to invert the image.
A:AnswerI have a amplifier for the sound and use HDMI cables to connect my DVD, Blu Ray, PS3 to the amplifier. Output through HDMI cable to my projector.
A:AnswerI did not find it had this feature but I did connect it to my Blue Ray player which does have that capability and it worked. Remember, this is only a projector so it will project whatever you connect to it and it has so many adaptors it seems like it can connect to most devices.