1. 2.4G remote control shark helical drive/bionic spine/2 speed acceleration 2. Chuck drag reduction design. Swim in water without pressure. The aerodynamic design effectively reduces the resistance of water flow and wind.The movable joints of the tail imitate the real shark swing joints with different bumps to show different moving paths in the water 3. Sealed waterproof cover screw blockage reinforcement sealing waterproof cover design effectively prevents water from entering the interior during manipulation 4. Dual-propeller design with built-in high-efficiency dual-motor dual-propeller drive, easy to achieve left and right swing forward, full of power and multi-directional control 5. Multiplayer game competition does not interfere with 2.4GHz wireless remote control, 30 meters long distance control stand-alone single frequency, suitable for multiplayer competition Applicable people:unlimited Features:2-in-1 Ability training:emotion, vision, intelligence development, hands-on brain, grasping, sensory, hand-eye coordination, other ability training, interactive toys, hearing, parent-child communication, interest training Remote control method:handle Colour:Blue Material:Plastic Size:34.5x14cm Package Contents: 1 * fish toy 1 * remote control 1 * battery charger 1 * screwdriver 2 * spare propeller 1 * rechargeable battery 1 * Chinese and English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.