This is a Casio Wave Ceptor. No battery changes or time adjustments are needed. The wrist size and dial size are shown in the latter half of the images, so please refer to them. Since I am listing many items, please refer to the images for scratches and stains. I have disinfected with alcohol and confirmed the operation before listing, but I do not guarantee continuous operation in the future, so please understand. This is a one-of-a-kind used item, so I do not recommend it to those who are looking for the quality of a current new watch. If you have any questions, please feel free to ask! Instant purchase is welcome! Items that have not been purchased for a long time may be removed from the listing without notice, please forgive me. Followers will receive a flat 3% discount on their first purchase. Repeat customers will receive a flat 5% discount from their second purchase onwards. Please let me know in the comments before purchasing, and I will make the changes. I cannot respond to follow-up messages after purchase, so please be sure to do so before purchasing. I am selling various items, mainly watches, to organize my collection. I would be happy if you would take a look at my other items as well. ↓↓↓↓↓ #PopotaWatchMens