BTetris DIY Constructible Retro Game Style Stackable LED Light Desk Lamp ReviewbP PP Tetris DIY Constructible Retro Game Style Stackable LED Light Desk Lamp PSeven-piece interlocking light fixture for fans of Tetris, Pieces can be stacked in any combination. As long as one of the main block(blue one) connected to the electric power supply, Other piled up can shine.PLight Source: LED, Weight: 688G, Material: PC+ABS.PNote：Each block has its positive and negative, must be properly placed in connection to light up.PInput: AC 110V-220V 5060HZ 150mA Output：DC5V，500mA.PFor International Shipping to USA, it takes 8-20 Working Days.