This article is pretty terrible. First, the sticky substance that should be easily removed from the wall is neither. I fixed it to the wall and found it was too low. When I tried to take it off, a piece of paint was actually removed from the wall. The sticky stuff also left gray marks all over the wall that were difficult to remove. The laser part was fine, it tapered about 2ft in front of the unit, I had to close the blinds and hang some wall decoration in the dark to see the line. I would not