THIS IS A LARGE SHOP DISPLAY CASE. IT IS SUPPOSED TO LIGHT UP BUT I CANT MAKE IT HAPPEN. THE YELLOW KNOB IS TO TURN THE BLADES ROUND ON THE HELICOPTER. PLEASE NOTE THAT BECAUSE OF THE SIZE OF THIS ITEM IT IS FOR LOCAL PICK UP ONLY AS IT MEASURES 23.5 INS X 15.25 INS X 14.75 INS.