Make waves at 25 kmh with this high speed racing boat (44cm/17in. Long). Features servo powered rudder for precise control, water sensor to auto-start boat when placed in the water, water-cooled motor, waterproof, anti-tilt hull and capsize recovery mode. Pistol type remote with low power warning. Includes display rack, spare propeller & charging cable. Not intended for use in salt water remote control requires 4""aa“ batteries (not included) item no. : q1 battery: 7. 4v 1500 mah li-poly (included) charging time: about 240 minutes transmitter battery: 4""aa"" batteries(not included) controlling distance: about 150 meters sailing time: about 8 minutes box size: 48. 5x 30. 6 x 14 cm product size: 43. 7 x 11. 7 x 12. 2 cm frequency: 2. 4g package description the following items can be found in this product package: • boat • remote control • main blade • usb charge • instruction manual • battery • support • lubricating oil (sym-q1)