Casio G-Shock GBM-2100-1A

Case size (L× W× H): 49.3 × 44.4 × 11.9 mm  
Weight: 72 g  
Case and bezel material: Resin (Bio-based) / Stainless steel  
Band: Bio-based resin band  
Construction: Shock Resistant  
Water resistance: 200-meter water resistance  
Power supply and battery life: Tough Solar (Solar powered)  
Smartphone Link feature: Mobile link (Wireless linking using Bluetooth®)  
Apps: CASIO WATCHES  
App connectivity feature: Auto time adjustment, Easy watch setting, Approximately 300 world time cities, Time & place, Reminder, Phone finder  
Glass: Mineral Glass  
Compatible band size: 145 to 215 mm  
Other: Neobrite
World time: 38 time zones
1/100-second stopwatch: Measuring capacity: 00'00''00~59'59''99 (for the first 60 minutes)
Countdown timer: Measuring unit: 1 second, Countdown range: 24 hours
5 daily alarms
Hourly time signal
Double LED light: LED light for the face, LED backlight for the digital display (Super illuminator, selectable illumination duration: 1.5 seconds or 3 seconds, afterglow)
LED Light Color: White
Full auto-calendar (to the year 2099)
Button operation tone on/off
Accuracy: ±15 seconds per month
12/24-hour format