Using this Kamen Rider Knight wristwatch is super easy. Just put it on your wrist like any other watch. To set the time, find the small buttons on the side of the watch and follow the basic instructions. As for care, keep it away from water as much as possible. Don't expose it to extreme heat or cold. If it gets dirty, use a soft, dry cloth to gently wipe it. Avoid hitting it against hard objects to prevent damage. With proper care, this watch will accompany you for a long time.