Product name: Remote control flying fish balloon Material: Plastic Weight: 400g Infrared control Remote function: climb, descent, and tail control range Remote control battery: No. 7 battery *3 (need to bring your own) Fish battery: No. 7 battery *1 (need to bring your own) Very interesting toy: This remote-controlled flying shark or clownfish flies around the room while piloting itself with lifelike fins, controlling these aerial inhabitants to move in different directions while avoiding obstacles such as stairs. Versatile: This is the perfect decorating appliance for indoor and family gatherings. This is also a great gift! (Not for outdoor use) Assembly tips: Requires 4 AAA batteries (not included) to operate, the assembly of accessories requires a lot of hands-on skills, we recommend that you view the product assembly video on the website before purchase! Material quality: The product is made of high quality and high quality nylon material, which can maintain expansion for about 2 weeks. Note: This toy needs to be filled with helium, not hydrogen, hydrogen on fire flammable. Helium is an inert gas, safe, general balloon shop, flower shop, square selling helium, wedding shop can add oh! The gas should not be too full, and the thermal expansion and contraction of the gas should be properly considered. Due to transportation reasons, the package does not contain gas and can be inflated repeatedly.