Product Name CASIO G-SHOCK Digital Solar Radio-Controlled Watch Bluetooth Compatible Men's Full Metal Silver GMW-B5000D-1JF Product Number GMW-B5000D-1JF Brand CASIO G-SHOCK Movement Digital Solar Radio-Controlled Module No.: 3459 ■Shock-Resistant Structure ■Tough Solar (Solar Charging System) ■20 ATM Water Resistance ■Radio Wave Reception: Automatic Reception (Up to 6 times/day) (Up to 5 times/day for China) / Manual Reception, Reception Waves: JJY, Frequency: 40kHz/60kHz (Compatible with Fukushima/Kyushu stations) Reception Signal: WWVB, Frequency: 60kHz Reception Signal: MSF/DCF77, Frequency: 60kHz/77.5kHz Reception Signal: BPC, Frequency: 68.5kHz *When the home time setting is set to a city where reception is possible, the watch receives the signal from the station corresponding to that city. The time difference is set based on the selected city. ■Mobile Link Function (Function linkage via Bluetooth communication with compatible mobile phones) ■World Time (5 bands): Displays time for 39 cities worldwide (39 time zones, with automatic daylight saving time setting) + UTC (Coordinated Universal Time), featuring home time swap function ■Stopwatch (1/100-second (under 1 hour)/1-second (over 1 hour), 24-hour timer, with split function) ■Timer (Set unit: 1 second, max set: 24 hours, measures in 1-second increments) ■5 alarms (only one with snooze function) and hourly time signal ■Battery charge warning function ■Power saving function (turns off display after a set time in dark environments to conserve power) ■Full auto calendar ■12/24-hour format switch ■Operation sound ON/OFF switch function ■Date display (month/day display interchangeable) ■Day of the week display (6 languages: English, Spanish, French, German, Italian, Russian) ■LED backlight (with full auto light, super illuminator, fade-in/fade-out, afterglow function, afterglow time switch (2 seconds/4 seconds)) ■Operating Time from Full Charge Without Solar Power: Approx. 10 months when using functions Approx. 22 months in Power Saving mode *If radio wave reception is unavailable or the watch is not paired with a smartphone, it operates with standard quartz accuracy (average monthly deviation ±15 seconds). Shock Resistant Screw-Down Back LED: White Crystal Material: Inorganic Glass Case Material: Stainless Steel Case Size: 49.3 × 43.2 mm Case Thickness: 13 mm Band Material: Solid Stainless Steel Band Band Clasp Type: One-Push Triple-Fold Clasp Wrist Circumference (Max): 20.5 cm Weight: 167 g