Using the Chalice Rouzer is easy. First, set the deck holder on the side of the belt. Then, take the Rouzer Unit and you can remove it from the belt just like in the show. To start the fun, scan the Change Mantis Rouze card on the unit. The center of the belt will light up and you'll hear Chalice's transformation sound. You can also use other cards to get different sounds. There are buttons on top of the unit that trigger newly - recorded dialogue and sound effects. You can even play 10 different Chalice BGMs. When it comes to payment, if you choose the payment plan, make sure to pay your monthly invoice on time. Otherwise, your pre - order might be canceled. For maintenance, keep the belt and cards away from water and extreme heat. Store them in a cool, dry place to make sure they last a long time.