FeiLun FT010 4Channel 2.4GHz Remote Controller Brushed Speedboat RC Racing Boat High Speed 35KM/H Water Cooling System Four Channels r/c Racing Boat.Water Cooling System. Running Speed Is About 35 Kilometers Per Hour Operation Distance Is About 100 To 150 Meters Battery:14.8v Lithium Battery (1500mah) When the Electric Quantity of the Battery Reduce, the Remote Control Will Be Beeping and the Red Light Flashing