Casio G-Shock [GM-B2100SD-1ADR]

Dimensions & Build
Case Size: 49.8 × 44.4 × 12.8 mm
Weight: 165 g
Material: Stainless steel case and bezel
Band: Stainless steel band with a solid structure and one-touch 3-fold clasp
Glass: Mineral Glass with Neobrite for enhanced visibility in low light
Back Plate: Screw lock back
Band Size Compatibility: 150–205 mm
Water Resistance: 200 meters
Construction: Shock Resistant

Power & Battery
Power Supply: Tough Solar (solar-powered)
Battery Life: 7 months on rechargeable battery (normal use), 18 months in total darkness with Power Saving mode
Energy Saving Features: Power Saving (display goes blank to conserve energy in the dark), Battery Level Indicator

Smartphone Link & App Features
Bluetooth® Connectivity: Links with smartphones for advanced functionality
App Compatibility: CASIO WATCHES app
Features: Auto time adjustment, easy watch setting, access to approximately 300 world time cities, time & place logging, reminder notifications, phone finder

Key Features
World Time: 38 time zones (38 cities + UTC), daylight saving on/off, auto summer time switching, home city/world time city swapping
Stopwatch: 1/100-second precision (first 60 minutes), measuring capacity: 00'00''00–59'59''99 (first 60 minutes), 1:00'00–23:59'59 (after 60 minutes), modes: elapsed time, lap time, split time
Countdown Timer: Range from 1 second to 60 minutes, measuring unit: 1 second, adjustable in 1-second or 1-minute increments
Alarms: 5 daily alarms, hourly time signal
Lighting: Double LED light with super illuminator for the analog face and digital display, selectable illumination duration (1.5 or 3 seconds) with afterglow, color: white
Calendar: Full auto-calendar (to the year 2099)

Timekeeping & Accuracy
Analog Display: 2 hands (hour, minute), 1 dial (battery level/mode indicator)
Digital Display: Hour, minute, second, pm, month, date, day
Additional Features: Hand shift (moves hands for an unobstructed view of the digital display), date/month display swapping, day display with six selectable languages
Time Format: 12/24-hour
Accuracy: ±15 seconds per month (without mobile link function)