Bandai Vital Bracelets are great boys and girls toys that let you raise a digital pet while encouraging fitness and activity. The more exercise you do while wearing this kids fitness tracker, the more your virtual pets will grow. The Demon Slayer Vital Bracelet set comes with one Vital Bracelet with a green transparent strap, one BE Demon Slayer memory card, and one USB-C charging cable. The Demon Slayer memory card allows you to train characters from the anime and manga series with 23 forms to discover. By undertaking different forms of exercise you can train specific stats with punches, squats, crunches, and dashing training attack power, power points, health points, and hit accuracy. As you walk while wearing the Vital Bracelet you will encounter new characters, objectives, and enemies to overcome. You can hold up to 4 characters on your girls and boys watch and upload more to the app where you can also engage in online battles with a team of trained cyber pets. BE memory cards let you raise different characters from different series, collect Digimon, My Hero Academia, and Tokyo Revengers memory cards to expand your digital world.