First of all, the package says it comes with the 9V battery, which it doesn't. The Remote takes a battery and the screw was too tight. I could not even open it and had to break the plastic battery piece on the back to install the battery. The boat itself takes 6 AA batteries and that part was fine. The boat is large and run great but the 2 hour endeavor to install the batteries in the remote was not worth the price. Buy another brand.