Set will be a unique gift for the chess player in your life. Chess pieces glow as they get closer to the board. The chess pieces are battery-free, and the board can be powered with the included adapter or six AA batteries (not included). When removed from the board, the illumination of the chess pieces start to fade. Board measures approximately 15 3/4" W x 15 3/4" L x 1" H. Some assembly required. Ninety day limited warranty. Adapter is UL listed. .