It's working properly. It continues to run even when left in the room, so I think the solar charging is also fine for now. The case diameter is about 3.5cm, which is small, but it has a screw-down crown for high water resistance. It's packed with features for a solar watch, including day, date, and a 24-hour hand. The blue dial, the circles on the small hands are a darker color, and there are red accents, so you can feel the attention to detail. The inner circumference of the belt is about 17.2cm. Thank you for your consideration.