this be a fairly low end clock . the clock display be dim and will only work after insert three aa battery , the attach power cord be only for the projection portion . once the battery be install , the display on the clock be on the dim end of the spectrum . the projection be great and it be good to have focus and rotation control . for the projection portion I give this clock \*\*\*\*\* , but for the overall clock , it only get \*\*\*