Thank you for viewing. This is a SEIKO WIRED wristwatch. It runs on solar charging, so there's no need for battery replacement. From everyday use to work, I think it will enhance your look without feeling out of place in any environment. I have confirmed its operation as it was charging when exposed to sunlight, so I am listing it as operational. Please check the photos for the condition and included accessories. As adjustment tools and extra links are included, you can adjust it to your size. - Brand: WIRED - Model Name: Solar Watch - Accessories: Instruction manual, adjustment tool, extra links, cushion - Colors: Blue, Silver