Put this robot parts together,then add salty water to the power compartment and off it goes! NO Batteries required! It's amazing! Material: Plastic The magnesium metal sheet (3 sheets included) can operate the car for about 4 hours continuously. If you want to park the vehicle simply take out the fuel cell module and rinse with tap water and dry. No batteries required just add salt water. Eco-friendly and energy saving. Only two drops of salt water can make it run 200 meters. Easy to take out the FC module when not in use. Warranty As part of our strong believe and confidence in our product. Welcome to contacting us if you get any question about the product.
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