This watch is the Casio G-Shock GW2310FB-1, a popular, highly durable timepiece known for its stealthy « blackout » aesthetic.Key Technical SpecificationsPower Source: Tough Solar power system, which charges via direct sunlight or fluorescent light.Time Synchronization: Multi-Band 6 atomic timekeeping, automatically syncing with radio signals across the US, UK, Germany, Japan, and China.Durability: Fully shock-resistant construction.Water Resistance: Up to 200 meters (20 bar), making it suitable for marine activities and serious surface water sports.Display Style: Matte black resin case featuring a distinctive negative digital display (light text on a dark background). As is.