& - The arm of this digital clock swivels 180 degrees for optimum positioning, getting the fine and smooth time figure image on the wall or ceiling at the appropriate distance of 1.64-11.4ft(0.5-3m). The edges of the projected numerals are surprisingly sharp and clear without having to fiddle with a focus adjustment offered on some other projection clocks. & - The curved screen with 3.4*1.7inch large digits is easy to read in the dark, even when you are not quite awake or without your glasses. With 3 adjustable levels, you can dial down it to a level that is readable in the daytime but unobtrusive at night. It allows you to separately adjust the brightness of the face display and the projection display.