Casio G-shock "CasiOak" Tough Solar

G-SHOCK GBM-2100: metal bezel, compact size 49.3 × 44.4 × 11.9 mm (72 g), shock-resistant structure, and water resistance to 20 bar. Tough Solar with power-saving mode and battery level indicator (approximate autonomy: 7 months normal use / 18 months in the dark). Smartphone Link via Bluetooth (CASIO WATCHES app) for automatic time adjustment, world time (~300 cities), reminders, time & location, find my phone. Bio-based resin and steel case/band, mineral glass, Neobrite, adjustable strap (145-215 mm). Dual LED light (Super Illuminator) for dial and display. Functions: world time with 38 time zones, 1/100-second stopwatch, 60-minute timer, 5 alarms, hourly time signal, full auto-calendar up to 2099, key mute, 12/24-hour format, hand-shift function, date/month display switching, and day names in 6 languages.