Using this Kamen Rider Decade women's watch is super easy. Just put it on your wrist and adjust the strap to fit comfortably. When it comes to battery replacement, if the watch stops working, take it to a professional watch repair shop. For daily maintenance, keep it away from water as much as possible. If it gets dirty, you can gently wipe it with a soft cloth. Also, avoid hitting it against hard objects to prevent scratches and damage.