I purchased this at a duty-free shop in Korea and used it for about a year, really liking it. However, it has been stored by a non-professional for over 5 years since then. My wrist size is 15cm, and it feels tight on me, so I think it would be better for someone with a smaller wrist. The battery is dead, but it's not broken. It was working at least during the time I was using it. Please understand that this is a used item.