A:AnswerIt has brackets that are secured to the back of your tv. Especially if it's a newer tv, they all come with pre-drilled holes to accommodate wall hanging. This product comes with multiple sized pieces (screws, spacers) to accommodate many different brand tv's
A:AnswerI would not set this stand on top of any other device, it is quite heavy. That said there is plenty of room to put a playbase or a combination of flat devices between the base of the stand and the bottom of the TV.
A:AnswerYes, it should work fine. It comes with almost every size screw to mount the rails to the back of the TV. Be sure to check your TV owners manual for the proper length screw.