Black Casio G-Shock GST-B500BD-1A9ER Watch with Gold-Tone Details The stylish Casio G-Shock watch has a durable stainless steel and carbon fiber reinforced resin watch case . The watch strap is made of durable and flexible resin and the watch bezel is made of stainless steel. The watch has a black case and bezel, a black dial and a black strap. Only the gold-colored details of the dial stand out from the dark overall. The watch has a solar movement that takes its energy from sunlight and you don't have to worry about batteries. Practicality is also brought to the watch by the Bluetooth function, which can be used to connect it to a smartphone wirelessly and thus gain access to many useful features. The stylish Casio G-Shock watch is shockproof and waterproof. The watch also has an automatic LED light, world time, timekeeping features and other features: Bluetooth Smart Two lights Impact resistant Solar movement Neo display that glows in the dark after exposure to light World time Timekeeping (1/100 s accuracy, up to 24 h) Timer (1/1 s, up to 60 min) 5 daily alarms Phone finder function Hands moving function Key sounds on/off Multilanguage Automatic calendar (day, weekday and month) 12/24 hour display Mineral glass Case material: carbon fiber reinforced resin and stainless steel Strap material: resin Battery life 2 years Battery status indicator Waterproof: 200m Case Size: 46.6mm x 48.9mm x 12.8mm Weight: 143 g Casio is a Japanese manufacturer of electronic devices, which is especially known for its high-quality and durable sports watches. Casio watches have versatile features and are suitable for both extreme sports and active everyday life. Casio watches are also popular among conscripts due to their durability and excellent value for money. See all Casio products here