Simple operation for quick color changes! A must-have for live performances and concerts, Lumica Penlight 15 Colors Daisenko Blade 100 Batteries are not included. It will light up brightly when batteries are inserted. I'm selling it because I no longer have opportunities to use penlights. Compatible with button battery regulations, so it can be used even at live performances with regulations on button battery penlights! Furthermore, to reduce strain on the arm as much as possible during live performances lasting 3-4 hours, the body weight is lightweight at 68g (including batteries)! * Size: Total length 213mm * Weight: Approximately 68g (including batteries) * Continuous light emission: Approximately 3-6 hours (varies depending on color usage) Set contents: Daisenko Blade 100 * 1 (with strap) Product specifications: Uses 6 button batteries LR44