Heidi Swapp-Battery Operated Lightbox: White. Create phrases and titles with ease with this lightbox! Design custom signs for parties, events and home decor! This 10x13-1/4x2-1/4 inch package contains one lightbox and one USB cord. WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm. Do not mouth or chew. Imported.