Corner Shelf - Lighted Display Shelving - (White) Turn the knob located on the bottom clockwise and the shelf simply lock in to place. The shelf is held in place by one blade on each side and a sharp nail that comes out of the back. Features 2 built-in lights to highlight your display pieces. 4 "AA" batteries (not included) Size: 14.5"w x 10"L x 1"d Color: White