Using your Muichiro Tokito's Nichirin Sword is easy! First, insert 2 AAA batteries (which you'll need to buy separately). Once the batteries are in, you can switch between demon - slaying mode and Muichiro mode. To activate the 'mist breathing' mode, just follow the instructions in the package. When you're done using it, turn it off to save battery life. Keep the sword away from water and extreme temperatures to prevent damage. If it gets dirty, use a soft, dry cloth to gently clean it. Don't try to take it apart on your own as it may void the warranty. And remember, this is a replica, so don't use it for any real - life fighting. Enjoy adding this amazing piece to your Demon Slayer collection!