ReFaXi&Acirc; Newest Blue Radio RC Remote Control Sub Submarine Boat Explorer Toy For Kids Hot The submarine can submerge in a fishpond or normal pond to carry out underwater exploration. This RC Remote Control Submarine is a great gift for the kids or Submarine fans. Battery: 4 AA alkaline dry batteries (not included) Material: Plastic + Electronic Component ;Colour: Blue Remote Control Size: About 4.96*2.36*0.67"