(Blue+Yellow+Red). they have to be in water to work. The engine will only start when the water is detected which protect the engine and prolong its life.
3PACK Remote Control Rc Boat for Kids, 2.4Ghz Control, Whole Body Waterproof, 6
2.4Ghz Control,3PACK Remote Control Rc Boat for Kids,6 Whole Body Waterproof,
