How to use: You can freely combine the 4 vehicles to create different formations. To activate the LEDs and voice lines on 2 of the vehicles, just press the button. This will light up the cockpit and play flight and special move sounds. Notice: Keep the product away from water to avoid damage to the electronic components. When playing, be gentle with the parts to prevent them from breaking. Maintenance advice: Use a dry cloth to wipe the product regularly. If there is dust in the crevices, you can use a small brush to clean it. Store the product in a cool and dry place when not in use.