Using this product is easy. First, make sure you have the DX Zero One Driver (sold separately). Then, attach the Eden Driver Unit to it to form the Eden Driver. Next, authorize and open the device, and insert the DX Eden Zetsumerise Key. Voila! You're transformed into Kamen Rider Eden. When using it, keep it away from water and don't drop it as it might damage the key's sound - producing function. For maintenance, just keep it in a dry place when not in use. That way, you can enjoy the transformation and the cool sounds from the show for a long time.