The G-Shock Black & Electro Green GAB2100BEG-1A pairs rugged G-SHOCK toughness with a bold black and electro green design. The black bezel, band, and dial provide a sleek base, while electro green accents on the LCD create sharp contrast. Dual LED lights illuminate both face and digital display for easy reading in low light. Powered by Module 5689, this 48.5 × 45.4 × 11.9mm, 52g watch is shock resistant, solar powered, and features Bluetooth® mobile link and hand shift for clear digital viewing. It includes world time across 38 zones, a 1/100-second stopwatch, countdown timer, 5 alarms, hourly signal, battery level indicator, and power-saving mode. The full auto-calendar, 12/24-hour formats, date/month swap, and multi-language day display keep you on time in style. Accurate to ±15 seconds per month, it runs 7 months on normal use or 18 months in power-saving mode. - Module: 5689 - 48.5 × 45.4 × 11.9mm Case Size - 52g Weight - Shock resistant (G-SHOCK) - Tough Solar (solar powered) - Double LED lights: face and digital display with Super Illuminator, selectable duration (1.5 or 3 seconds), afterglow - Mobile link via Bluetooth® - Hand shift feature (moves hands for clear digital view) - World time: 38 time zones (38 cities + UTC), auto DST, home/world city swapping - 1/100-second stopwatch (up to 24 hours) with elapsed and lap/split times - Countdown timer: 1-second units, 1–60 minutes, auto-repeat - 5 daily alarms and hourly time signal - Battery level indicator and power-saving display - Full auto-calendar to 2099, 12/24-hour format, button tone on/off - Date/month swap, day display in six languages - Regular timekeeping: analog (hour, minute, battery/mode dial), digital (hour, minute, second, pm, month, date, day) - Accuracy: ±15 seconds per month (without mobile link) - Battery life: 7 months normal use, 18 months with power save in darkness