Key specifications/special features: arrow comes standard with a 2. 4ghz marine radio system providing extended range and interference-free operation specifications: 2. 4ghz brushless motor high speed rc boat product size: 63 x 17 x 11cm color size: 68. 5 x 24 x 17. 5cm carton size: 71*36*41cm total weight (without packing): 1. 22kg quantity: 4 pieces/carton run time: about 5-7 minutes charging time: 180 minutes remote distance: 120-150 meters drone battery: 11. 1v, 2200mah lithium battery with over-charge and discharge protection controller battery: 4*1. 5aa (not included) function features: full-scale forward/backward, left/right rudder, special anti-tilt function, low battery alarm, speed up to 50kph, motor water cooling system, built-in navigation rudder, turning radius 2. 5m packing contents: 1 x 2. 4g transmitter 1 x tail propeller 1 x lithium battery for boat hxt 3. 5mm plug. 1 x wall charger voltage: 5v rated power: 2. 1w 1 x balance charger 1 x screwdriver 2 x bracket (udi-005)