Purchased in June 2002. I used it for desk work for 3-4 years, but haven't used it much since then. I have never used it underwater. Recently, the screen would suddenly switch while using the stopwatch. The time is normal, and the light works. I'm not familiar with the other functions, so I'm not sure about them. Condition: There is considerable aging and deterioration. I had the battery replaced and a water resistance test done at the CASIO repair center, but they said the packing is deteriorated, so water resistance cannot be expected during the next battery replacement. There is no original box, so I will send it in another box. Please understand the above. I am not considering lowering the price. - Model Name: FROGMAN - Manufacturer: CASIO Thank you for looking.