Introducing the G-Shock GAB2100C-9A Yellow Bluetooth Solar 'CasiOak', a resilient timepiece with smartphone connectivity. With its durable carbon/resin construction, tough solar power, and 200 meters water resistance, it's built for adventure. Packed with features like world time, stopwatch, timer, and alarms, it keeps you organized. Plus, its energy-saving design ensures long-lasting battery life. Complete with Bluetooth® link, it offers seamless connectivity and convenience on the go. - 48.5 × 45.4 × 11.9mm Case Size - 52g Weight - Carbon/Resin Case and Bezel　 - Resin Band - Shock Resistant - Carbon Core Guard structure - 200 Meters Water Resistant - Tough Solar (Solar powered) - Smartphone Link feature: Mobile link (Wireless linking using Bluetooth®) - Auto time adjustment - Easy watch setting - Approximately 300 world time cities - Time & place - Reminder - Phone finder - Mineral Glass - World time: 38 time zones (38 cities coordinated universal time), city code display, city name display, daylight saving on/off, auto summer time (DST) switching, Home city/World time city swapping - Stopwatch - Timer - Alarm/hourly time signal - 5 daily alarms - Hourly time signal - Calendar: Full auto-calendar (to year 2099) - Mute feature: Button operation tone on/off - Energy saving feature - Power Saving (display goes blank to save power when the watch is left in the dark) - Approx. battery operating time: *7 months on rechargeable battery (operation period with normal use without exposure to light after charge) *18 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge) - Accuracy: ±15 seconds per month (with no mobile link function) - Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.) - 12/24-hour format - Date/month display swapping - Day display (days of the week selectable in six languages)