It lights up when you give it an impact! Test batteries are included! The insulating tape has not been removed to check if it lights up. If you would like to confirm it, please comment. Test batteries are included in the main unit. You can replace the batteries yourself when they run out. Although it is new and unused with tags, it was obtained from a crane game, so there may be initial scratches, dirt, or dents. Please understand the above before purchasing. Since it will be stored at home, Please refrain from purchasing if you are nervous about it.