Brushless RC Racing 20KM/h High Speed Electronic Remote Control For Adults Kids Introduction: 2.4GHZ High Speed: 2.4Ghz marine radio control system supports multiple rc boats to race synchronously! The max speed up to 20km/h allow you blow other remote control boats out of the water! Ideal rc racing ship toys for Pool and Outdoor! Brushless Watercooled Motor: Powered by a potent Brushless Watercooled Motor, with automatic water system, to extend the service life of the ship model. Yaw correction：When the direction is deviated, the can correct automatically, so that the speedboat can the water more smoothly Capsize Recovery Feature: Self-Righting Hull Design gets the racing back to the game quickly while the is capsizing . Poor Signal Alarm: The transmitter of the rc will issue alarm sound for you to make a reversa or stop the on while the signal becomes poor. Specifications: Brand: UdiR/C Item No: UDI906 Box size: 315x130x155mm Max speed: ≥15km-20KM/h Charging Time: 120 minutes Remote distance: about 120-150m Weight: about 550g,with box Battery: 3.7 650mAh battery(included) Remote control：4 x AA battery (not included) Color:yellow Frequency: 2.4G Using Time: about 8-10 minutes size: 278x70x67mm(LxWxH) Packing List: 1 x Rc Boat(included the battery) 1 x Transmitter 1 x Charger 1 x English Manual