FS is Casio's famous square G-shock. This is the version with the upgraded module and stainless steel back. Has multiband 6 and solar powered so time is always accurate and you never have to set it. As you can see this includes the Jays and Keys adapter that allows you to use any 20mm band/strap. This will come with the upgraded rubber OEM strap as well along with this khaki Crown and Buckle Supreme NATO which pairs well IMO. Official specs here: https://www.casio.com/us/watches/gshock/product.GW-5000U-1/ No box or papers, watch only. 9.5/10 condition. CONUS only, price firm at $199 shipped from Los Angeles, CA. Zelle preferred.