The G-Shock Solar Bluetooth GMB2100D-1A Full Metal Watch. With its stainless-steel construction and 200 meters water resistance, it's built for durability. Features like tough solar power and smartphone link keep you connected and powered up. Enjoy world time with 300 cities, stopwatch, timer, and 5 daily alarms for ultimate functionality. Complete with LED light, full auto-calendar, and ±15 seconds per month accuracy, it's both reliable and convenient. - 49.8 × 44.4 × 12.8mm Case Size - 165g Weight - Stainless Steel Band, Bezel and Case - One-touch 3-fold Clasp - Shock Resistant - 200 Meters Water Resistant - Bluetooth: Connects to a smartphone and automatically adjusts the time - Tough Solar (Solar powered) - Smartphone Link feature: Mobile link (Wireless linking using Bluetooth®) - Approximately 300 world time cities - Time & place - Reminder - Phone finder - Mineral Glass - Screw Lock Back - World time: 38 time zones (38 cities + coordinated universal time), 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 - Double LED light - Calendar: Full auto-calendar (to year 2099) - Mute feature: Button operation tone on/off - 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) - Regular timekeeping