CASIO WVA-M630D Radio Solar Watch The band length can be easily adjusted. (Please refer to the second photo.) Reason for being junk: It was working half a year ago, but it stopped due to over-discharge while being stored in a box. I tried exposing it to light, but it didn't recover. I think the internal rechargeable battery needs to be replaced. (I confirmed that the internal rechargeable battery CTL920 is sold on Amazon for just under 1500 yen, but I gave up because I don't have the technical skills.) Please purchase only if you understand the above conditions.