From G-SHOCK, which continues to evolve in pursuit of toughness, comes the G-STEEL featuring the "Carbon Core Guard Structure." Release Date: May 2019 Weight: 87 g Carbon / Stainless Steel Resin Band Shock Resistant Structure (Shock Resist), Carbon Core Guard Structure 20-bar Water Resistance Automatic time correction via Bluetooth connection Tough Solar (solar charging system) Bluetooth communication compatible Compatible with "CASIO WATCHES" Full Auto Calendar Thank you for viewing. There is some wear and tear, and there are minor scratches and dirt, but there are no problems with the operation. Please refrain from purchasing if you are sensitive to used items. Thank you for your consideration. #Watch