Using this Hellrise Progrise Key is super easy. First, you need to get the DX Zero One Driver (it's sold separately). Then, insert the Progrise Key into the driver to become Kamen Rider Zero - One Hell rising Hopper. Once you're transformed, press the button on the key to enjoy the cool special move sounds. When not in use, keep the key in a dry and safe place. Avoid dropping it or getting it wet to make sure it lasts a long time. If you have any problems, don't hesitate to contact our customer service.