What's the difference between these two ? What is that “REM” ? “Lithium “ , I think it's battery ? Was better or worst or how is that battery ? : r/gshock
Amazon.com: Casio GM-B2100BD-1AJF [G-Shock GA-2100 Series Full Metal Model with Smartphone Link] Men's Watch Shipped from Japan Aug 2022 Model : Clothing, Shoes & Jewelry
Casio G-Shock Full Metal Dark Grey Steel Solar Bluetooth 2100 CasiOak – NAGI