Salt Water Powered Car DIY Assembled Scientific Experiments Brine Power Toy Car Material: ABS + Electronic components.Use saline as power and energy.Requires only 2 drops of saline, can travel 20 minutes. Saline solution: 20% to 99% salt water ratio,20% is the best After a period of using,the car will slowly stop.Add saline water can continue to run again. Anode metal sheet may be oxidized,if not use, you can replace it with a new anode metal sheet.Our product contains three anode metal sheet. When not in use, please clean the FC module, rinse the cathode plate and anode plate ,remove residual salt, drying all parts, otherwise it will shorten the life of the anode metal sheet.