Our Service : 3d Hologram Fan Is An Independent Research And Development Company, Which Provides 1 Year Of Replacement Parts And 3 Years Of Professional Customer Service And Technical Support For Our Products. We Have A Dedicated After-Sales Mailbox And Can Provide Remote Computer Guidance, Remote Video Services, Etc. And We Will Answer In A Timely Manner. Contact Us For More Information! Free Video Library : The 25.6" 3d Holographic Fan Comes With A Very Large Video Library, Including Videos About Food, The Universe, Science Fiction, Animation, Etc. After Purchasing, Please Contact Us To Request Access To The Video Library.