・Shock-resistant structure (shock resist) ・Carbon core guard structure ・20 ATM water resistant ・Tough solar (solar charging system) ・Mobile link function (function interlocked with compatible mobile phones via Bluetooth communication) ・ CASIO WATCHES compatible, black IP (band, case, bezel), world time, stopwatch, timer, 5 time alarms, time signal, double LED light, fully automatic calendar, operation sound ON/OFF switching function, power saving function (A certain amount of time passes in the dark.・Indicator display ・Hand retraction function (if the hands overlap with the LCD display and are difficult to see, the hands can be temporarily retracted from above the LCD display) ・12/24 hours System display switching, date display (month/day display switching), day of the week display (switching between 6 languages: English, Spanish, French, German, Italian, and Russian) Case (length x width x thickness): Approx. 46.6 x 48.9 x 12.8mm Belt arm circumference: Approximately 15-20.5cm Accessories: Instruction manual (English) G-SHOCK original box Casio G-Shock G-STEEL GST-B500 Series Bluetooth Solar Men's Watch GST-B500BD-1A9DR CASIO G-SHOCK G-STEEL GST-B500 SERIES Ana-Digi Black Black ◆From the toughness watch G-SHOCK, which has continued to evolve in pursuit of insatiable strength since its release in 1983, this model uses the popular black and gold colors based on the G-STEEL series, which combines different materials such as metal and resin. is. Using a black base and gold color for the dial, the design is gorgeous and can be used in a wide range of ways as a fashion item. The base model uses GST-B500 with a thin module and carbon core guard structure. The G-STEEL series, which combines toughness and design, comes in popular colors such as black and gold, and has a cool design that can be used in a wide range of applications. Domestic model product number: GST-B500BD-1A9JF