Remote Controlled submarines are the best toys for the kids to make it swim over or dive into water controlled just through a transmitter. Can float forward, backward, up, down, and can do the flips while in water. Perfectly build with waterproof plastic and electronic devices having a safeguard feature in your kid's hands making your kids feel like they are driving a real nuclear sailing in the sea. It can be used in water tanks, pools, ponds, lakes, etc. Automatic as it is activated when put in the water with LED lights. By playing with it kids will get the next level of excitement and enjoyment. AA batteries are used to make it function which can be replaced or recharged through a normal USB.